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   1  <?php
   2  /**
   3   * MyBB 1.6
   4   * Copyright 2010 MyBB Group, All Rights Reserved
   5   *
   6   * Website: http://mybb.com
   7   * License: http://mybb.com/about/license
   8   *
   9   * $Id$
  10   */
  11  
  12  /**
  13   * Outputs a page directly to the browser, parsing anything which needs to be parsed.
  14   *
  15   * @param string The contents of the page.
  16   */
  17  function output_page($contents)
  18  {
  19      global $db, $lang, $theme, $plugins, $mybb;
  20      global $debug, $templatecache, $templatelist, $maintimer, $globaltime, $parsetime;
  21  
  22      $contents = parse_page($contents);
  23      $totaltime = $maintimer->stop();
  24  
  25      if($mybb->usergroup['cancp'] == 1)
  26      {
  27          if($mybb->settings['extraadmininfo'] != 0)
  28          {
  29              $phptime = $maintimer->format($maintimer->totaltime - $db->query_time);
  30              $query_time = $maintimer->format($db->query_time);
  31  
  32              if($maintimer->totaltime > 0)
  33              {
  34                  $percentphp = number_format((($phptime/$maintimer->totaltime) * 100), 2);
  35                  $percentsql = number_format((($query_time/$maintimer->totaltime) * 100), 2);
  36              }
  37              else
  38              {
  39                  // if we've got a super fast script...  all we can do is assume something
  40                  $percentphp = 0;
  41                  $percentsql = 0;
  42              }
  43  
  44              $phpversion = PHP_VERSION;
  45  
  46              $serverload = get_server_load();
  47  
  48              if(my_strpos(getenv("REQUEST_URI"), "?"))
  49              {
  50                  $debuglink = htmlspecialchars_uni(getenv("REQUEST_URI")) . "&amp;debug=1";
  51              }
  52              else
  53              {
  54                  $debuglink = htmlspecialchars_uni(getenv("REQUEST_URI")) . "?debug=1";
  55              }
  56  
  57              if($mybb->settings['gzipoutput'] != 0)
  58              {
  59                  $gzipen = "Enabled";
  60              }
  61              else
  62              {
  63                  $gzipen = "Disabled";
  64              }
  65  
  66              $memory_usage = get_memory_usage();
  67  
  68              if($memory_usage)
  69              {
  70                  $memory_usage = " / Memory Usage: ".get_friendly_size($memory_usage);
  71              }
  72              else
  73              {
  74                  $memory_usage = '';
  75              }
  76              // MySQLi is still MySQL, so present it that way to the user
  77              $database_server = $db->short_title;
  78  
  79              if($database_server == 'MySQLi')
  80              {
  81                  $database_server = 'MySQL';
  82              }
  83              $other = "PHP version: $phpversion / Server Load: $serverload / GZip Compression: $gzipen";
  84              $debugstuff = "Generated in $totaltime seconds ($percentphp% PHP / $percentsql% ".$database_server.")<br />SQL Queries: $db->query_count /  Global Parsing Time: $globaltime$memory_usage<br />$other<br />[<a href=\"$debuglink\" target=\"_blank\">advanced details</a>]<br />";
  85              $contents = str_replace("<debugstuff>", $debugstuff, $contents);
  86          }
  87  
  88          if($mybb->debug_mode == true)
  89          {
  90              debug_page();
  91          }
  92      }
  93  
  94      $contents = str_replace("<debugstuff>", "", $contents);
  95      $contents = $plugins->run_hooks("pre_output_page", $contents);
  96  
  97      if($mybb->settings['gzipoutput'] == 1)
  98      {
  99          $contents = gzip_encode($contents, $mybb->settings['gziplevel']);
 100      }
 101  
 102      @header("Content-type: text/html; charset={$lang->settings['charset']}");
 103  
 104      echo $contents;
 105  
 106      $plugins->run_hooks("post_output_page");
 107  }
 108  
 109  /**
 110   * Adds a function or class to the list of code to run on shutdown.
 111   *
 112   * @param mixed The name of the function.
 113   * @param mixed An array of arguments for the function
 114   * @return boolean True if function exists, otherwise false.
 115   */
 116  function add_shutdown($name, $arguments=array())
 117  {
 118      global $shutdown_functions;
 119  
 120      if(!is_array($shutdown_functions))
 121      {
 122          $shutdown_functions = array();
 123      }
 124  
 125      if(!is_array($arguments))
 126      {
 127          $arguments = array($arguments);
 128      }
 129  
 130      if(is_array($name) && method_exists($name[0], $name[1]))
 131      {
 132          $shutdown_functions[] = array('function' => $name, 'arguments' => $arguments);
 133          return true;
 134      }
 135      else if(!is_array($name) && function_exists($name))
 136      {
 137          $shutdown_functions[] = array('function' => $name, 'arguments' => $arguments);
 138          return true;
 139      }
 140  
 141      return false;
 142  }
 143  
 144  /**
 145   * Runs the shutdown items after the page has been sent to the browser.
 146   *
 147   */
 148  function run_shutdown()
 149  {
 150      global $config, $db, $cache, $plugins, $error_handler, $shutdown_functions, $shutdown_queries, $done_shutdown, $mybb;
 151  
 152      if($done_shutdown == true || !$config || $error_handler->has_errors)
 153      {
 154          return;
 155      }
 156  
 157      // Missing the core? Build
 158      if(!is_object($mybb))
 159      {
 160          require_once  MYBB_ROOT."inc/class_core.php";
 161          $mybb = new MyBB;
 162  
 163          // Load the settings
 164          require  MYBB_ROOT."inc/settings.php";
 165          $mybb->settings = &$settings;
 166      }
 167  
 168  
 169      // If our DB has been deconstructed already (bad PHP 5.2.0), reconstruct
 170      if(!is_object($db))
 171      {
 172          if(!isset($config) || empty($config['database']['type']))
 173          {
 174              require MYBB_ROOT."inc/config.php";
 175          }
 176  
 177          if(isset($config))
 178          {
 179              require_once MYBB_ROOT."inc/db_".$config['database']['type'].".php";
 180              switch($config['database']['type'])
 181              {
 182                  case "sqlite":
 183                      $db = new DB_SQLite;
 184                      break;
 185                  case "pgsql":
 186                      $db = new DB_PgSQL;
 187                      break;
 188                  case "mysqli":
 189                      $db = new DB_MySQLi;
 190                      break;
 191                  default:
 192                      $db = new DB_MySQL;
 193              }
 194  
 195  
 196              $db->connect($config['database']);
 197              define("TABLE_PREFIX", $config['database']['table_prefix']);
 198              $db->set_table_prefix(TABLE_PREFIX);
 199          }
 200      }
 201  
 202      // Cache object deconstructed? reconstruct
 203      if(!is_object($cache))
 204      {
 205          require_once  MYBB_ROOT."inc/class_datacache.php";
 206          $cache = new datacache;
 207          $cache->cache();
 208      }
 209  
 210      // And finally.. plugins
 211      if(!is_object($plugins) && !defined("NO_PLUGINS") && !($mybb->settings['no_plugins'] == 1))
 212      {
 213          require_once  MYBB_ROOT."inc/class_plugins.php";
 214          $plugins = new pluginSystem;
 215          $plugins->load();
 216      }
 217  
 218      // We have some shutdown queries needing to be run
 219      if(is_array($shutdown_queries))
 220      {
 221          // Loop through and run them all
 222          foreach($shutdown_queries as $query)
 223          {
 224              $db->query($query);
 225          }
 226      }
 227  
 228      // Run any shutdown functions if we have them
 229      if(is_array($shutdown_functions))
 230      {
 231          foreach($shutdown_functions as $function)
 232          {
 233              call_user_func_array($function['function'], $function['arguments']);
 234          }
 235      }
 236  
 237      $done_shutdown = true;
 238  }
 239  
 240  /**
 241   * Sends a specified amount of messages from the mail queue
 242   *
 243   * @param int The number of messages to send (Defaults to 10)
 244   */
 245  function send_mail_queue($count=10)
 246  {
 247      global $db, $cache, $plugins;
 248  
 249      $plugins->run_hooks("send_mail_queue_start");
 250  
 251      // Check to see if the mail queue has messages needing to be sent
 252      $mailcache = $cache->read("mailqueue");
 253      if($mailcache['queue_size'] > 0 && ($mailcache['locked'] == 0 || $mailcache['locked'] < TIME_NOW-300))
 254      {
 255          // Lock the queue so no other messages can be sent whilst these are (for popular boards)
 256          $cache->update_mailqueue(0, TIME_NOW);
 257  
 258          // Fetch emails for this page view - and send them
 259          $query = $db->simple_select("mailqueue", "*", "", array("order_by" => "mid", "order_dir" => "asc", "limit_start" => 0, "limit" => $count));
 260  
 261          while($email = $db->fetch_array($query))
 262          {
 263              // Delete the message from the queue
 264              $db->delete_query("mailqueue", "mid='{$email['mid']}'");
 265  
 266              if($db->affected_rows() == 1)
 267              {
 268                  my_mail($email['mailto'], $email['subject'], $email['message'], $email['mailfrom'], "", $email['headers'], true);
 269              }
 270          }
 271          // Update the mailqueue cache and remove the lock
 272          $cache->update_mailqueue(TIME_NOW, 0);
 273      }
 274  
 275      $plugins->run_hooks("send_mail_queue_end");
 276  }
 277  
 278  /**
 279   * Parses the contents of a page before outputting it.
 280   *
 281   * @param string The contents of the page.
 282   * @return string The parsed page.
 283   */
 284  function parse_page($contents)
 285  {
 286      global $lang, $theme, $mybb, $htmldoctype, $archive_url, $error_handler;
 287  
 288      $contents = str_replace('<navigation>', build_breadcrumb(1), $contents);
 289      $contents = str_replace('<archive_url>', $archive_url, $contents);
 290  
 291      if($htmldoctype)
 292      {
 293          $contents = $htmldoctype.$contents;
 294      }
 295      else
 296      {
 297          $contents = "<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Transitional//EN\" \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\">\n".$contents;
 298      }
 299  
 300      $contents = str_replace("<html", "<html xmlns=\"http://www.w3.org/1999/xhtml\"", $contents);
 301  
 302      if($lang->settings['rtl'] == 1)
 303      {
 304          $contents = str_replace("<html", "<html dir=\"rtl\"", $contents);
 305      }
 306  
 307      if($lang->settings['htmllang'])
 308      {
 309          $contents = str_replace("<html", "<html xml:lang=\"".$lang->settings['htmllang']."\" lang=\"".$lang->settings['htmllang']."\"", $contents);
 310      }
 311  
 312      if($error_handler->warnings)
 313      {
 314          $contents = str_replace("<body>", "<body>\n".$error_handler->show_warnings(), $contents);
 315      }
 316  
 317      return $contents;
 318  }
 319  
 320  /**
 321   * Turn a unix timestamp in to a "friendly" date/time format for the user.
 322   *
 323   * @param string A date format according to PHP's date structure.
 324   * @param int The unix timestamp the date should be generated for.
 325   * @param int The offset in hours that should be applied to times. (timezones)
 326   * @param int Whether or not to use today/yesterday formatting.
 327   * @param boolean Whether or not to use the adodb time class for < 1970 or > 2038 times
 328   * @return string The formatted timestamp.
 329   */
 330  function my_date($format, $stamp="", $offset="", $ty=1, $adodb=false)
 331  {
 332      global $mybb, $lang, $mybbadmin, $plugins;
 333  
 334      // If the stamp isn't set, use TIME_NOW
 335      if(empty($stamp))
 336      {
 337          $stamp = TIME_NOW;
 338      }
 339  
 340      if(!$offset && $offset != '0')
 341      {
 342          if(isset($mybb->user['uid']) && $mybb->user['uid'] != 0 && array_key_exists("timezone", $mybb->user))
 343          {
 344              $offset = $mybb->user['timezone'];
 345              $dstcorrection = $mybb->user['dst'];
 346          }
 347          elseif(defined("IN_ADMINCP"))
 348          {
 349              $offset =  $mybbadmin['timezone'];
 350              $dstcorrection = $mybbadmin['dst'];
 351          }
 352          else
 353          {
 354              $offset = $mybb->settings['timezoneoffset'];
 355              $dstcorrection = $mybb->settings['dstcorrection'];
 356          }
 357  
 358          // If DST correction is enabled, add an additional hour to the timezone.
 359          if($dstcorrection == 1)
 360          {
 361              ++$offset;
 362              if(my_substr($offset, 0, 1) != "-")
 363              {
 364                  $offset = "+".$offset;
 365              }
 366          }
 367      }
 368  
 369      if($offset == "-")
 370      {
 371          $offset = 0;
 372      }
 373  
 374      if($adodb == true && function_exists('adodb_date'))
 375      {
 376          $date = adodb_date($format, $stamp + ($offset * 3600));
 377      }
 378      else
 379      {
 380          $date = gmdate($format, $stamp + ($offset * 3600));
 381      }
 382  
 383      if($mybb->settings['dateformat'] == $format && $ty)
 384      {
 385          $stamp = TIME_NOW;
 386  
 387          if($adodb == true && function_exists('adodb_date'))
 388          {
 389              $todaysdate = adodb_date($format, $stamp + ($offset * 3600));
 390              $yesterdaysdate = adodb_date($format, ($stamp - 86400) + ($offset * 3600));
 391          }
 392          else
 393          {
 394              $todaysdate = gmdate($format, $stamp + ($offset * 3600));
 395              $yesterdaysdate = gmdate($format, ($stamp - 86400) + ($offset * 3600));
 396          }
 397  
 398          if($todaysdate == $date)
 399          {
 400              $date = $lang->today;
 401          }
 402          else if($yesterdaysdate == $date)
 403          {
 404              $date = $lang->yesterday;
 405          }
 406      }
 407  
 408      if(is_object($plugins))
 409      {
 410          $date = $plugins->run_hooks("my_date", $date);
 411      }
 412  
 413      return $date;
 414  }
 415  
 416  /**
 417   * Sends an email using PHP's mail function, formatting it appropriately.
 418   *
 419   * @param string Address the email should be addressed to.
 420   * @param string The subject of the email being sent.
 421   * @param string The message being sent.
 422   * @param string The from address of the email, if blank, the board name will be used.
 423   * @param string The chracter set being used to send this email.
 424   * @param boolean Do we wish to keep the connection to the mail server alive to send more than one message (SMTP only)
 425   * @param string The format of the email to be sent (text or html). text is default
 426   * @param string The text message of the email if being sent in html format, for email clients that don't support html
 427   * @param string The email address to return to. Defaults to admin return email address.
 428   */
 429  function my_mail($to, $subject, $message, $from="", $charset="", $headers="", $keep_alive=false, $format="text", $message_text="", $return_email="")
 430  {
 431      global $mybb;
 432      static $mail;
 433  
 434      // Does our object not exist? Create it
 435      if(!is_object($mail))
 436      {
 437          require_once  MYBB_ROOT."inc/class_mailhandler.php";
 438  
 439          if($mybb->settings['mail_handler'] == 'smtp')
 440          {
 441              require_once  MYBB_ROOT."inc/mailhandlers/smtp.php";
 442              $mail = new SmtpMail();
 443          }
 444          else
 445          {
 446              require_once  MYBB_ROOT."inc/mailhandlers/php.php";
 447              $mail = new PhpMail();
 448          }
 449      }
 450  
 451      // Using SMTP based mail
 452      if($mybb->settings['mail_handler'] == 'smtp')
 453      {
 454          if($keep_alive == true)
 455          {
 456              $mail->keep_alive = true;
 457          }
 458      }
 459  
 460      // Using PHP based mail()
 461      else
 462      {
 463          if($mybb->settings['mail_parameters'] != '')
 464          {
 465              $mail->additional_parameters = $mybb->settings['mail_parameters'];
 466          }
 467      }
 468  
 469      // Build and send
 470      $mail->build_message($to, $subject, $message, $from, $charset, $headers, $format, $message_text, $return_email);
 471      return $mail->send();
 472  }
 473  
 474  /**
 475   * Generates a unique code for POST requests to prevent XSS/CSRF attacks
 476   *
 477   * @return string The generated code
 478   */
 479  function generate_post_check()
 480  {
 481      global $mybb, $session;
 482      if($mybb->user['uid'])
 483      {
 484          return md5($mybb->user['loginkey'].$mybb->user['salt'].$mybb->user['regdate']);
 485      }
 486      // Guests get a special string
 487      else
 488      {
 489          return md5($session->useragent.$mybb->config['database']['username'].$mybb->settings['internal']['encryption_key']);
 490      }
 491  }
 492  
 493  /**
 494   * Verifies a POST check code is valid, if not shows an error (silently returns false on silent parameter)
 495   *
 496   * @param string The incoming POST check code
 497   * @param boolean Silent mode or not (silent mode will not show the error to the user but returns false)
 498   */
 499  function verify_post_check($code, $silent=false)
 500  {
 501      global $lang;
 502      if(generate_post_check() != $code)
 503      {
 504          if($silent == true)
 505          {
 506              return false;
 507          }
 508          else
 509          {
 510              if(defined("IN_ADMINCP"))
 511              {
 512                  return false;
 513              }
 514              else
 515              {
 516                  error($lang->invalid_post_code);
 517              }
 518          }
 519      }
 520      else
 521      {
 522          return true;
 523      }
 524  }
 525  
 526  /**
 527   * Return a parent list for the specified forum.
 528   *
 529   * @param int The forum id to get the parent list for.
 530   * @return string The comma-separated parent list.
 531   */
 532  function get_parent_list($fid)
 533  {
 534      global $forum_cache;
 535      static $forumarraycache;
 536  
 537      if($forumarraycache[$fid])
 538      {
 539          return $forumarraycache[$fid]['parentlist'];
 540      }
 541      elseif($forum_cache[$fid])
 542      {
 543          return $forum_cache[$fid]['parentlist'];
 544      }
 545      else
 546      {
 547          cache_forums();
 548          return $forum_cache[$fid]['parentlist'];
 549      }
 550  }
 551  
 552  /**
 553   * Build a parent list of a specific forum, suitable for querying
 554   *
 555   * @param int The forum ID
 556   * @param string The column name to add to the query
 557   * @param string The joiner for each forum for querying (OR | AND | etc)
 558   * @param string The parent list of the forum - if you have it
 559   * @return string The query string generated
 560   */
 561  function build_parent_list($fid, $column="fid", $joiner="OR", $parentlist="")
 562  {
 563      if(!$parentlist)
 564      {
 565          $parentlist = get_parent_list($fid);
 566      }
 567  
 568      $parentsexploded = explode(",", $parentlist);
 569      $builtlist = "(";
 570      $sep = '';
 571  
 572      foreach($parentsexploded as $key => $val)
 573      {
 574          $builtlist .= "$sep$column='$val'";
 575          $sep = " $joiner ";
 576      }
 577  
 578      $builtlist .= ")";
 579  
 580      return $builtlist;
 581  }
 582  
 583  /**
 584   * Load the forum cache in to memory
 585   *
 586   * @param boolean True to force a reload of the cache
 587   */
 588  function cache_forums($force=false)
 589  {
 590      global $forum_cache, $cache;
 591  
 592      if($force == true)
 593      {
 594          $forum_cache = $cache->read("forums", 1);
 595          return $forum_cache;
 596      }
 597  
 598      if(!$forum_cache)
 599      {
 600          $forum_cache = $cache->read("forums");
 601          if(!$forum_cache)
 602          {
 603              $cache->update_forums();
 604              $forum_cache = $cache->read("forums", 1);
 605          }
 606      }
 607      return $forum_cache;
 608  }
 609  
 610  /**
 611   * Generate an array of all child and descendant forums for a specific forum.
 612   *
 613   * @param int The forum ID
 614   * @param return Array of descendants
 615   */
 616  function get_child_list($fid)
 617  {
 618      static $forums_by_parent;
 619  
 620      $forums = array();
 621      if(!is_array($forums_by_parent))
 622      {
 623          $forum_cache = cache_forums();
 624          foreach($forum_cache as $forum)
 625          {
 626              if($forum['active'] != 0)
 627              {
 628                  $forums_by_parent[$forum['pid']][$forum['fid']] = $forum;
 629              }
 630          }
 631      }
 632      if(!is_array($forums_by_parent[$fid]))
 633      {
 634          return;
 635      }
 636  
 637      foreach($forums_by_parent[$fid] as $forum)
 638      {
 639          $forums[] = $forum['fid'];
 640          $children = get_child_list($forum['fid']);
 641          if(is_array($children))
 642          {
 643              $forums = array_merge($forums, $children);
 644          }
 645      }
 646      return $forums;
 647  }
 648  
 649  /**
 650   * Produce a friendly error message page
 651   *
 652   * @param string The error message to be shown
 653   * @param string The title of the message shown in the title of the page and the error table
 654   */
 655  function error($error="", $title="")
 656  {
 657      global $header, $footer, $theme, $headerinclude, $db, $templates, $lang, $mybb, $plugins;
 658  
 659      $error = $plugins->run_hooks("error", $error);
 660      if(!$error)
 661      {
 662          $error = $lang->unknown_error;
 663      }
 664  
 665      // AJAX error message?
 666      if($mybb->input['ajax'])
 667      {
 668          // Send our headers.
 669          @header("Content-type: text/html; charset={$lang->settings['charset']}");
 670          echo "<error>{$error}</error>\n";
 671          exit;
 672      }
 673  
 674      if(!$title)
 675      {
 676          $title = $mybb->settings['bbname'];
 677      }
 678  
 679      $timenow = my_date($mybb->settings['dateformat'], TIME_NOW) . " " . my_date($mybb->settings['timeformat'], TIME_NOW);
 680      reset_breadcrumb();
 681      add_breadcrumb($lang->error);
 682  
 683      eval("\$errorpage = \"".$templates->get("error")."\";");
 684      output_page($errorpage);
 685  
 686      exit;
 687  }
 688  
 689  /**
 690   * Produce an error message for displaying inline on a page
 691   *
 692   * @param array Array of errors to be shown
 693   * @param string The title of the error message
 694   * @return string The inline error HTML
 695   */
 696  function inline_error($errors, $title="")
 697  {
 698      global $theme, $mybb, $db, $lang, $templates;
 699  
 700      if(!$title)
 701      {
 702          $title = $lang->please_correct_errors;
 703      }
 704  
 705      if(!is_array($errors))
 706      {
 707          $errors = array($errors);
 708      }
 709  
 710      // AJAX error message?
 711      if($mybb->input['ajax'])
 712      {
 713          $error = implode("\n\n", $errors);
 714          // Send our headers.
 715          @header("Content-type: text/html; charset={$lang->settings['charset']}");
 716          echo "<error>{$error}</error>\n";
 717          exit;
 718      }
 719  
 720      foreach($errors as $error)
 721      {
 722          $errorlist .= "<li>".$error."</li>\n";
 723      }
 724  
 725      eval("\$errors = \"".$templates->get("error_inline")."\";");
 726  
 727      return $errors;
 728  }
 729  
 730  /**
 731   * Presents the user with a "no permission" page
 732   */
 733  function error_no_permission()
 734  {
 735      global $mybb, $theme, $templates, $db, $lang, $plugins, $session;
 736  
 737      $time = TIME_NOW;
 738      $plugins->run_hooks("no_permission");
 739  
 740      $noperm_array = array (
 741          "nopermission" => '1',
 742          "location1" => 0,
 743          "location2" => 0
 744      );
 745  
 746      $db->update_query("sessions", $noperm_array, "sid='{$session->sid}'", 1);
 747  
 748      if($mybb->input['ajax'])
 749      {
 750          // Send our headers.
 751          header("Content-type: text/html; charset={$lang->settings['charset']}");
 752          echo "<error>{$lang->error_nopermission_user_ajax}</error>\n";
 753          exit;
 754      }
 755  
 756      if($mybb->user['uid'])
 757      {
 758          $lang->error_nopermission_user_username = $lang->sprintf($lang->error_nopermission_user_username, $mybb->user['username']);
 759          eval("\$errorpage = \"".$templates->get("error_nopermission_loggedin")."\";");
 760      }
 761      else
 762      {
 763          // Redirect to where the user came from
 764          $redirect_url = $_SERVER['PHP_SELF'];
 765          if($_SERVER['QUERY_STRING'])
 766          {
 767              $redirect_url .= '?'.$_SERVER['QUERY_STRING'];
 768          }
 769  
 770          $redirect_url = htmlspecialchars_uni($redirect_url);
 771  
 772          switch($mybb->settings['username_method'])
 773          {
 774              case 0:
 775                  $lang_username = $lang->username;
 776                  break;
 777              case 1:
 778                  $lang_username = $lang->username1;
 779                  break;
 780              case 2:
 781                  $lang_username = $lang->username2;
 782                  break;
 783              default:
 784                  $lang_username = $lang->username;
 785                  break;
 786          }
 787          eval("\$errorpage = \"".$templates->get("error_nopermission")."\";");
 788      }
 789  
 790      error($errorpage);
 791  }
 792  
 793  /**
 794   * Redirect the user to a given URL with a given message
 795   *
 796   * @param string The URL to redirect the user to
 797   * @param string The redirection message to be shown
 798   */
 799  function redirect($url, $message="", $title="")
 800  {
 801      global $header, $footer, $mybb, $theme, $headerinclude, $templates, $lang, $plugins;
 802  
 803      $redirect_args = array('url' => &$url, 'message' => &$message, 'title' => &$title);
 804  
 805      $plugins->run_hooks("redirect", $redirect_args);
 806  
 807      if($mybb->input['ajax'])
 808      {
 809          // Send our headers.
 810          @header("Content-type: text/html; charset={$lang->settings['charset']}");
 811          echo "<script type=\"text/javascript\">\n";
 812          if($message != "")
 813          {
 814              echo 'alert("'.addslashes($message).'");';
 815          }
 816          $url = str_replace("#", "&#", $url);
 817          $url = htmlspecialchars_decode($url);
 818          $url = str_replace(array("\n","\r",";"), "", $url);
 819          echo 'window.location = "'.addslashes($url).'";'."\n";
 820          echo "</script>\n";
 821          exit;
 822      }
 823  
 824      if(!$message)
 825      {
 826          $message = $lang->redirect;
 827      }
 828  
 829      $time = TIME_NOW;
 830      $timenow = my_date($mybb->settings['dateformat'], $time) . " " . my_date($mybb->settings['timeformat'], $time);
 831  
 832      if(!$title)
 833      {
 834          $title = $mybb->settings['bbname'];
 835      }
 836  
 837      // Show redirects only if both ACP and UCP settings are enabled, or ACP is enabled, and user is a guest.
 838      if($mybb->settings['redirects'] == 1 && ($mybb->user['showredirect'] != 0 || !$mybb->user['uid']))
 839      {
 840          $url = str_replace("&amp;", "&", $url);
 841          $url = htmlspecialchars_uni($url);
 842  
 843          eval("\$redirectpage = \"".$templates->get("redirect")."\";");
 844          output_page($redirectpage);
 845      }
 846      else
 847      {
 848          $url = htmlspecialchars_decode($url);
 849          $url = str_replace(array("\n","\r",";"), "", $url);
 850  
 851          run_shutdown();
 852  
 853          if(my_substr($url, 0, 7) !== 'http://' && my_substr($url, 0, 8) !== 'https://' && my_substr($url, 0, 1) !== '/')
 854          {
 855              header("Location: {$mybb->settings['bburl']}/{$url}");
 856          }
 857          else
 858          {
 859              header("Location: {$url}");
 860          }
 861      }
 862  
 863      exit;
 864  }
 865  
 866  /**
 867   * Generate a listing of page - pagination
 868   *
 869   * @param int The number of items
 870   * @param int The number of items to be shown per page
 871   * @param int The current page number
 872   * @param string The URL to have page numbers tacked on to (If {page} is specified, the value will be replaced with the page #)
 873   * @return string The generated pagination
 874   */
 875  function multipage($count, $perpage, $page, $url, $breadcrumb=false)
 876  {
 877      global $theme, $templates, $lang, $mybb;
 878  
 879      if($count <= $perpage)
 880      {
 881          return;
 882      }
 883  
 884      $url = str_replace("&amp;", "&", $url);
 885      $url = htmlspecialchars_uni($url);
 886  
 887      $pages = ceil($count / $perpage);
 888  
 889      $prevpage = '';
 890      if($page > 1)
 891      {
 892          $prev = $page-1;
 893          $page_url = fetch_page_url($url, $prev);
 894          eval("\$prevpage = \"".$templates->get("multipage_prevpage")."\";");
 895      }
 896  
 897      // Maximum number of "page bits" to show
 898      if(!$mybb->settings['maxmultipagelinks'])
 899      {
 900          $mybb->settings['maxmultipagelinks'] = 5;
 901      }
 902  
 903      $from = $page-floor($mybb->settings['maxmultipagelinks']/2);
 904      $to = $page+floor($mybb->settings['maxmultipagelinks']/2);
 905  
 906      if($from <= 0)
 907      {
 908          $from = 1;
 909          $to = $from+$mybb->settings['maxmultipagelinks']-1;
 910      }
 911  
 912      if($to > $pages)
 913      {
 914          $to = $pages;
 915          $from = $pages-$mybb->settings['maxmultipagelinks']+1;
 916          if($from <= 0)
 917          {
 918              $from = 1;
 919          }
 920      }
 921  
 922      if($to == 0)
 923      {
 924          $to = $pages;
 925      }
 926  
 927      $start = '';
 928      if($from > 1)
 929      {
 930          if($from-1 == 1)
 931          {
 932              $lang->multipage_link_start = '';
 933          }
 934  
 935          $page_url = fetch_page_url($url, 1);
 936          eval("\$start = \"".$templates->get("multipage_start")."\";");
 937      }
 938  
 939      $mppage = '';
 940      for($i = $from; $i <= $to; ++$i)
 941      {
 942          $page_url = fetch_page_url($url, $i);
 943          if($page == $i)
 944          {
 945              if($breadcrumb == true)
 946              {
 947                  eval("\$mppage .= \"".$templates->get("multipage_page_link_current")."\";");
 948              }
 949              else
 950              {
 951                  eval("\$mppage .= \"".$templates->get("multipage_page_current")."\";");
 952              }
 953          }
 954          else
 955          {
 956              eval("\$mppage .= \"".$templates->get("multipage_page")."\";");
 957          }
 958      }
 959  
 960      $end = '';
 961      if($to < $pages)
 962      {
 963          if($to+1 == $pages)
 964          {
 965              $lang->multipage_link_end = '';
 966          }
 967  
 968          $page_url = fetch_page_url($url, $pages);
 969          eval("\$end = \"".$templates->get("multipage_end")."\";");
 970      }
 971  
 972      $nextpage = '';
 973      if($page < $pages)
 974      {
 975          $next = $page+1;
 976          $page_url = fetch_page_url($url, $next);
 977          eval("\$nextpage = \"".$templates->get("multipage_nextpage")."\";");
 978      }
 979  
 980      $lang->multipage_pages = $lang->sprintf($lang->multipage_pages, $pages);
 981  
 982      if($breadcrumb == true)
 983      {
 984          eval("\$multipage = \"".$templates->get("multipage_breadcrumb")."\";");
 985      }
 986      else
 987      {
 988          eval("\$multipage = \"".$templates->get("multipage")."\";");
 989      }
 990  
 991      return $multipage;
 992  }
 993  
 994  /**
 995   * Generate a page URL for use by the multipage function
 996   *
 997   * @param string The URL being passed
 998   * @param int The page number
 999   */
1000  function fetch_page_url($url, $page)
1001  {
1002      if($page <= 1)
1003      {
1004          $find = array(
1005              "-page-{page}",
1006              "&amp;page={page}",
1007              "{page}"
1008          );
1009  
1010          // Remove "Page 1" to the defacto URL
1011          $url = str_replace($find, array("", "", $page), $url);
1012          return $url;
1013      }
1014      else if(strpos($url, "{page}") === false)
1015      {
1016          // If no page identifier is specified we tack it on to the end of the URL
1017          if(strpos($url, "?") === false)
1018          {
1019              $url .= "?";
1020          }
1021          else
1022          {
1023              $url .= "&amp;";
1024          }
1025  
1026          $url .= "page=$page";
1027      }
1028      else
1029      {
1030          $url = str_replace("{page}", $page, $url);
1031      }
1032  
1033      return $url;
1034  }
1035  
1036  /**
1037   * Fetch the permissions for a specific user
1038   *
1039   * @param int The user ID
1040   * @return array Array of user permissions for the specified user
1041   */
1042  function user_permissions($uid=0)
1043  {
1044      global $mybb, $cache, $groupscache, $user_cache;
1045  
1046      // If no user id is specified, assume it is the current user
1047      if($uid == 0)
1048      {
1049          $uid = $mybb->user['uid'];
1050      }
1051  
1052      // User id does not match current user, fetch permissions
1053      if($uid != $mybb->user['uid'])
1054      {
1055          // We've already cached permissions for this user, return them.
1056          if($user_cache[$uid]['permissions'])
1057          {
1058              return $user_cache[$uid]['permissions'];
1059          }
1060  
1061          // This user was not already cached, fetch their user information.
1062          if(!$user_cache[$uid])
1063          {
1064              $user_cache[$uid] = get_user($uid);
1065          }
1066  
1067          // Collect group permissions.
1068          $gid = $user_cache[$uid]['usergroup'].",".$user_cache[$uid]['additionalgroups'];
1069          $groupperms = usergroup_permissions($gid);
1070  
1071          // Store group permissions in user cache.
1072          $user_cache[$uid]['permissions'] = $groupperms;
1073          return $groupperms;
1074      }
1075      // This user is the current user, return their permissions
1076      else
1077      {
1078          return $mybb->usergroup;
1079      }
1080  }
1081  
1082  /**
1083   * Fetch the usergroup permissions for a specic group or series of groups combined
1084   *
1085   * @param mixed A list of groups (Can be a single integer, or a list of groups separated by a comma)
1086   * @return array Array of permissions generated for the groups
1087   */
1088  function usergroup_permissions($gid=0)
1089  {
1090      global $cache, $groupscache, $grouppermignore, $groupzerogreater;
1091  
1092      if(!is_array($groupscache))
1093      {
1094          $groupscache = $cache->read("usergroups");
1095      }
1096  
1097      $groups = explode(",", $gid);
1098  
1099  
1100      if(count($groups) == 1)
1101      {
1102          return $groupscache[$gid];
1103      }
1104  
1105      foreach($groups as $gid)
1106      {
1107          if(trim($gid) == "" || !$groupscache[$gid])
1108          {
1109              continue;
1110          }
1111  
1112          foreach($groupscache[$gid] as $perm => $access)
1113          {
1114              if(!in_array($perm, $grouppermignore))
1115              {
1116                  if(isset($usergroup[$perm]))
1117                  {
1118                      $permbit = $usergroup[$perm];
1119                  }
1120                  else
1121                  {
1122                      $permbit = "";
1123                  }
1124  
1125                  // 0 represents unlimited for numerical group permissions (i.e. private message limit) so take that into account.
1126                  if(in_array($perm, $groupzerogreater) && ($access == 0 || $permbit === 0))
1127                  {
1128                      $usergroup[$perm] = 0;
1129                      continue;
1130                  }
1131  
1132                  if($access > $permbit || ($access == "yes" && $permbit == "no") || !$permbit) // Keep yes/no for compatibility?
1133                  {
1134                      $usergroup[$perm] = $access;
1135                  }
1136              }
1137          }
1138      }
1139  
1140      return $usergroup;
1141  }
1142  
1143  /**
1144   * Fetch the display group properties for a specific display group
1145   *
1146   * @param int The group ID to fetch the display properties for
1147   * @return array Array of display properties for the group
1148   */
1149  function usergroup_displaygroup($gid)
1150  {
1151      global $cache, $groupscache, $displaygroupfields;
1152  
1153      if(!is_array($groupscache))
1154      {
1155          $groupscache = $cache->read("usergroups");
1156      }
1157  
1158      $displaygroup = array();
1159      $group = $groupscache[$gid];
1160  
1161      foreach($displaygroupfields as $field)
1162      {
1163          $displaygroup[$field] = $group[$field];
1164      }
1165  
1166      return $displaygroup;
1167  }
1168  
1169  /**
1170   * Build the forum permissions for a specific forum, user or group
1171   *
1172   * @param int The forum ID to build permissions for (0 builds for all forums)
1173   * @param int The user to build the permissions for (0 will select the uid automatically)
1174   * @param int The group of the user to build permissions for (0 will fetch it)
1175   * @return array Forum permissions for the specific forum or forums
1176   */
1177  function forum_permissions($fid=0, $uid=0, $gid=0)
1178  {
1179      global $db, $cache, $groupscache, $forum_cache, $fpermcache, $mybb, $usercache, $cached_forum_permissions_permissions, $cached_forum_permissions;
1180  
1181      if($uid == 0)
1182      {
1183          $uid = $mybb->user['uid'];
1184      }
1185  
1186      if(!$gid || $gid == 0) // If no group, we need to fetch it
1187      {
1188          if($uid != 0 && $uid != $mybb->user['uid'])
1189          {
1190              if(!$usercache[$uid])
1191              {
1192                  $query = $db->simple_select("users", "*", "uid='$uid'");
1193                  $usercache[$uid] = $db->fetch_array($query);
1194              }
1195  
1196              $gid = $usercache[$uid]['usergroup'].",".$usercache[$uid]['additionalgroups'];
1197              $groupperms = usergroup_permissions($gid);
1198          }
1199          else
1200          {
1201              $gid = $mybb->user['usergroup'];
1202  
1203              if(isset($mybb->user['additionalgroups']))
1204              {
1205                  $gid .= ",".$mybb->user['additionalgroups'];
1206              }
1207  
1208              $groupperms = $mybb->usergroup;
1209          }
1210      }
1211  
1212      if(!is_array($forum_cache))
1213      {
1214          $forum_cache = cache_forums();
1215  
1216          if(!$forum_cache)
1217          {
1218              return false;
1219          }
1220      }
1221  
1222      if(!is_array($fpermcache))
1223      {
1224          $fpermcache = $cache->read("forumpermissions");
1225      }
1226  
1227      if($fid) // Fetch the permissions for a single forum
1228      {
1229          if(!$cached_forum_permissions_permissions[$gid][$fid])
1230          {
1231              $cached_forum_permissions_permissions[$gid][$fid] = fetch_forum_permissions($fid, $gid, $groupperms);
1232          }
1233          return $cached_forum_permissions_permissions[$gid][$fid];
1234      }
1235      else
1236      {
1237          if(!$cached_forum_permissions[$gid])
1238          {
1239              foreach($forum_cache as $forum)
1240              {
1241                  $cached_forum_permissions[$gid][$forum['fid']] = fetch_forum_permissions($forum['fid'], $gid, $groupperms);
1242              }
1243          }
1244          return $cached_forum_permissions[$gid];
1245      }
1246  }
1247  
1248  /**
1249   * Fetches the permissions for a specific forum/group applying the inheritance scheme.
1250   * Called by forum_permissions()
1251   *
1252   * @param int The forum ID
1253   * @param string A comma separated list of usergroups
1254   * @param array Group permissions
1255   * @return array Permissions for this forum
1256  */
1257  function fetch_forum_permissions($fid, $gid, $groupperms)
1258  {
1259      global $groupscache, $forum_cache, $fpermcache, $mybb, $fpermfields;
1260  
1261      $groups = explode(",", $gid);
1262  
1263      if(empty($fpermcache[$fid])) // This forum has no custom or inherited permissions so lets just return the group permissions
1264      {
1265          return $groupperms;
1266      }
1267  
1268      $current_permissions = array();
1269      $only_view_own_threads = 1;
1270  
1271      foreach($groups as $gid)
1272      {
1273          if($groupscache[$gid])
1274          {
1275              $level_permissions = $fpermcache[$fid][$gid];
1276  
1277              // If our permissions arn't inherited we need to figure them out
1278              if(empty($level_permissions))
1279              {
1280                  $parents = explode(',', $forum_cache[$fid]['parentlist']);
1281                  rsort($parents);
1282                  if(!empty($parents))
1283                  {
1284                      foreach($parents as $parent_id)
1285                      {
1286                          if(!empty($fpermcache[$parent_id][$gid]))
1287                          {
1288                              $level_permissions = $fpermcache[$parent_id][$gid];
1289                              break;
1290                          }
1291                      }
1292  
1293                      // If we STILL don't have forum permissions we use the usergroup itself
1294                      if(empty($level_permissions))
1295                      {
1296                          $level_permissions = $groupscache[$gid];
1297                      }
1298                  }
1299              }
1300  
1301              foreach($level_permissions as $permission => $access)
1302              {
1303                  if($access >= $current_permissions[$permission] || ($access == "yes" && $current_permissions[$permission] == "no") || !$current_permissions[$permission])
1304                  {
1305                      $current_permissions[$permission] = $access;
1306                  }
1307              }
1308  
1309              if($level_permissions["canview"] && !$level_permissions["canonlyviewownthreads"])
1310              {
1311                  $only_view_own_threads = 0;
1312              }
1313          }
1314      }
1315  
1316      // Figure out if we can view more than our own threads
1317      if($only_view_own_threads == 0)
1318      {
1319          $current_permissions["canonlyviewownthreads"] = 0;
1320      }
1321  
1322      if(count($current_permissions) == 0)
1323      {
1324          $current_permissions = $groupperms;
1325      }
1326      return $current_permissions;
1327  }
1328  
1329  /**
1330   * Check the password given on a certain forum for validity
1331   *
1332   * @param int The forum ID
1333   * @param boolean The Parent ID
1334   */
1335  function check_forum_password($fid, $pid=0)
1336  {
1337      global $mybb, $header, $footer, $headerinclude, $theme, $templates, $lang, $forum_cache;
1338  
1339      $showform = true;
1340  
1341      if(!is_array($forum_cache))
1342      {
1343          $forum_cache = cache_forums();
1344          if(!$forum_cache)
1345          {
1346              return false;
1347          }
1348      }
1349  
1350      // Loop through each of parent forums to ensure we have a password for them too
1351      $parents = explode(',', $forum_cache[$fid]['parentlist']);
1352      rsort($parents);
1353      if(!empty($parents))
1354      {
1355          foreach($parents as $parent_id)
1356          {
1357              if($parent_id == $fid || $parent_id == $pid)
1358              {
1359                  continue;
1360              }
1361  
1362              if($forum_cache[$parent_id]['password'] != "")
1363              {
1364                  check_forum_password($parent_id, $fid);
1365              }
1366          }
1367      }
1368  
1369      $password = $forum_cache[$fid]['password'];
1370      if($password)
1371      {
1372          if($mybb->input['pwverify'] && $pid == 0)
1373          {
1374              if($password == $mybb->input['pwverify'])
1375              {
1376                  my_setcookie("forumpass[$fid]", md5($mybb->user['uid'].$mybb->input['pwverify']), null, true);
1377                  $showform = false;
1378              }
1379              else
1380              {
1381                  eval("\$pwnote = \"".$templates->get("forumdisplay_password_wrongpass")."\";");
1382                  $showform = true;
1383              }
1384          }
1385          else
1386          {
1387              if(!$mybb->cookies['forumpass'][$fid] || ($mybb->cookies['forumpass'][$fid] && md5($mybb->user['uid'].$password) != $mybb->cookies['forumpass'][$fid]))
1388              {
1389                  $showform = true;
1390              }
1391              else
1392              {
1393                  $showform = false;
1394              }
1395          }
1396      }
1397      else
1398      {
1399          $showform = false;
1400      }
1401  
1402      if($showform)
1403      {
1404          if($pid)
1405          {
1406              header("Location: ".$mybb->settings['bburl']."/".get_forum_link($fid));
1407          }
1408          else
1409          {
1410              $_SERVER['REQUEST_URI'] = htmlspecialchars_uni($_SERVER['REQUEST_URI']);
1411              eval("\$pwform = \"".$templates->get("forumdisplay_password")."\";");
1412              output_page($pwform);
1413          }
1414          exit;
1415      }
1416  }
1417  
1418  /**
1419   * Return the permissions for a moderator in a specific forum
1420   *
1421   * @param fid The forum ID
1422   * @param uid The user ID to fetch permissions for (0 assumes current logged in user)
1423   * @param string The parent list for the forum (if blank, will be fetched)
1424   * @return array Array of moderator permissions for the specific forum
1425   */
1426  function get_moderator_permissions($fid, $uid="0", $parentslist="")
1427  {
1428      global $mybb, $cache, $db;
1429      static $modpermscache;
1430  
1431      if($uid < 1)
1432      {
1433          $uid = $mybb->user['uid'];
1434      }
1435  
1436      if($uid == 0)
1437      {
1438          return false;
1439      }
1440  
1441      if(isset($modpermscache[$fid][$uid]))
1442      {
1443          return $modpermscache[$fid][$uid];
1444      }
1445  
1446      if(!$parentslist)
1447      {
1448          $parentslist = explode(',', get_parent_list($fid));
1449      }
1450  
1451      // Get user groups
1452      $perms = array();
1453      $user = get_user($uid);
1454  
1455      $groups = array($user['usergroup']);
1456  
1457      if(!empty($user['additionalgroups']))
1458      {
1459          $extra_groups = explode(",", $user['additionalgroups']);
1460  
1461          foreach($extra_groups as $extra_group)
1462          {
1463              $groups[] = $extra_group;
1464          }
1465      }
1466  
1467      $mod_cache = $cache->read("moderators");
1468  
1469      foreach($mod_cache as $fid => $forum)
1470      {
1471          if(!is_array($forum) || !in_array($fid, $parentslist))
1472          {
1473              // No perms or we're not after this forum
1474              continue;
1475          }
1476  
1477          // User settings override usergroup settings
1478          if(is_array($forum['users'][$uid]))
1479          {
1480              $perm = $forum['users'][$uid];
1481              foreach($perm as $action => $value)
1482              {
1483                  if(strpos($action, "can") === false)
1484                  {
1485                      continue;
1486                  }
1487  
1488                  // Figure out the user permissions
1489                  if($value == 0)
1490                  {
1491                      // The user doesn't have permission to set this action
1492                      $perms[$action] = 0;
1493                  }
1494                  else
1495                  {
1496                      $perms[$action] = max($perm[$action], $perms[$action]);
1497                  }
1498              }
1499          }
1500  
1501          foreach($groups as $group)
1502          {
1503              if(!is_array($forum['usergroups'][$group]))
1504              {
1505                  // There are no permissions set for this group
1506                  continue;
1507              }
1508  
1509              $perm = $forum['usergroups'][$group];
1510              foreach($perm as $action => $value)
1511              {
1512                  if(strpos($action, "can") === false)
1513                  {
1514                      continue;
1515                  }
1516  
1517                  $perms[$action] = max($perm[$action], $perms[$action]);
1518              }
1519          }
1520      }
1521  
1522      $modpermscache[$fid][$uid] = $perms;
1523  
1524      return $perms;
1525  }
1526  
1527  /**
1528   * Checks if a moderator has permissions to perform an action in a specific forum
1529   *
1530   * @param int The forum ID (0 assumes global)
1531   * @param string The action tyring to be performed. (blank assumes any action at all)
1532   * @param int The user ID (0 assumes current user)
1533   * @return bool Returns true if the user has permission, false if they do not
1534   */
1535  function is_moderator($fid="0", $action="", $uid="0")
1536  {
1537      global $mybb, $cache;
1538  
1539      if($uid == 0)
1540      {
1541          $uid = $mybb->user['uid'];
1542      }
1543  
1544      if($uid == 0)
1545      {
1546          return false;
1547      }
1548  
1549      $user_perms = user_permissions($uid);
1550      if($user_perms['issupermod'] == 1)
1551      {
1552          return true;
1553      }
1554      else
1555      {
1556          if(!$fid)
1557          {
1558              $modcache = $cache->read('moderators');
1559              if(!empty($modcache))
1560              {
1561                  foreach($modcache as $modusers)
1562                  {
1563                      if(isset($modusers['users'][$uid]) && $modusers['users'][$uid]['mid'])
1564                      {
1565                          return true;
1566                      }
1567                      elseif(isset($modusers['usergroups'][$user_perms['gid']]))
1568                      {
1569                          // Moderating usergroup
1570                          return true;
1571                      }
1572                  }
1573              }
1574              return false;
1575          }
1576          else
1577          {
1578              $modperms = get_moderator_permissions($fid, $uid);
1579  
1580              if(!$action && $modperms)
1581              {
1582                  return true;
1583              }
1584              else
1585              {
1586                  if($modperms[$action] == 1)
1587                  {
1588                      return true;
1589                  }
1590                  else
1591                  {
1592                      return false;
1593                  }
1594              }
1595          }
1596      }
1597  }
1598  
1599  /**
1600   * Generate a list of the posticons.
1601   *
1602   * @return string The template of posticons.
1603   */
1604  function get_post_icons()
1605  {
1606      global $mybb, $cache, $icon, $theme, $templates, $lang;
1607  
1608      $listed = 0;
1609      if($mybb->input['icon'])
1610      {
1611          $icon = $mybb->input['icon'];
1612      }
1613  
1614      $iconlist = '';
1615      $no_icons_checked = " checked=\"checked\"";
1616      // read post icons from cache, and sort them accordingly
1617      $posticons_cache = $cache->read("posticons");
1618      $posticons = array();
1619      foreach($posticons_cache as $posticon)
1620      {
1621          $posticons[$posticon['name']] = $posticon;
1622      }
1623      krsort($posticons);
1624  
1625      foreach($posticons as $dbicon)
1626      {
1627          $dbicon['path'] = htmlspecialchars_uni($dbicon['path']);
1628          $dbicon['name'] = htmlspecialchars_uni($dbicon['name']);
1629  
1630          if($icon == $dbicon['iid'])
1631          {
1632              $iconlist .= "<label><input type=\"radio\" name=\"icon\" value=\"".$dbicon['iid']."\" checked=\"checked\" /> <img src=\"".$dbicon['path']."\" alt=\"".$dbicon['name']."\" /></label>";
1633              $no_icons_checked = "";
1634          }
1635          else
1636          {
1637              $iconlist .= "<label><input type=\"radio\" name=\"icon\" value=\"".$dbicon['iid']."\" /> <img src=\"".$dbicon['path']."\" alt=\"".$dbicon['name']."\" /></label>";
1638          }
1639  
1640          ++$listed;
1641          if($listed == 10)
1642          {
1643              $iconlist .= "<br />";
1644              $listed = 0;
1645          }
1646      }
1647  
1648      eval("\$posticons = \"".$templates->get("posticons")."\";");
1649  
1650      return $posticons;
1651  }
1652  
1653  /**
1654   * MyBB setcookie() wrapper.
1655   *
1656   * @param string The cookie identifier.
1657   * @param string The cookie value.
1658   * @param int The timestamp of the expiry date.
1659   * @param boolean True if setting a HttpOnly cookie (supported by IE, Opera 9, Konqueror)
1660   */
1661  function my_setcookie($name, $value="", $expires="", $httponly=false)
1662  {
1663      global $mybb;
1664  
1665      if(!$mybb->settings['cookiepath'])
1666      {
1667          $mybb->settings['cookiepath'] = "/";
1668      }
1669  
1670      if($expires == -1)
1671      {
1672          $expires = 0;
1673      }
1674      elseif($expires == "" || $expires == null)
1675      {
1676          $expires = TIME_NOW + (60*60*24*365); // Make the cookie expire in a years time
1677      }
1678      else
1679      {
1680          $expires = TIME_NOW + intval($expires);
1681      }
1682  
1683      $mybb->settings['cookiepath'] = str_replace(array("\n","\r"), "", $mybb->settings['cookiepath']);
1684      $mybb->settings['cookiedomain'] = str_replace(array("\n","\r"), "", $mybb->settings['cookiedomain']);
1685      $mybb->settings['cookieprefix'] = str_replace(array("\n","\r", " "), "", $mybb->settings['cookieprefix']);
1686  
1687      // Versions of PHP prior to 5.2 do not support HttpOnly cookies and IE is buggy when specifying a blank domain so set the cookie manually
1688      $cookie = "Set-Cookie: {$mybb->settings['cookieprefix']}{$name}=".urlencode($value);
1689  
1690      if($expires > 0)
1691      {
1692          $cookie .= "; expires=".@gmdate('D, d-M-Y H:i:s \\G\\M\\T', $expires);
1693      }
1694  
1695      if(!empty($mybb->settings['cookiepath']))
1696      {
1697          $cookie .= "; path={$mybb->settings['cookiepath']}";
1698      }
1699  
1700      if(!empty($mybb->settings['cookiedomain']))
1701      {
1702          $cookie .= "; domain={$mybb->settings['cookiedomain']}";
1703      }
1704  
1705      if($httponly == true)
1706      {
1707          $cookie .= "; HttpOnly";
1708      }
1709  
1710      $mybb->cookies[$name] = $value;
1711  
1712      header($cookie, false);
1713  }
1714  
1715  /**
1716   * Unset a cookie set by MyBB.
1717   *
1718   * @param string The cookie identifier.
1719   */
1720  function my_unsetcookie($name)
1721  {
1722      global $mybb;
1723  
1724      $expires = -3600;
1725      my_setcookie($name, "", $expires);
1726  
1727      unset($mybb->cookies[$name]);
1728  }
1729  
1730  /**
1731   * Get the contents from a serialised cookie array.
1732   *
1733   * @param string The cookie identifier.
1734   * @param int The cookie content id.
1735   * @return array|boolean The cookie id's content array or false when non-existent.
1736   */
1737  function my_get_array_cookie($name, $id)
1738  {
1739      global $mybb;
1740  
1741      if(!isset($mybb->cookies['mybb'][$name]))
1742      {
1743          return false;
1744      }
1745  
1746      $cookie = my_unserialize($mybb->cookies['mybb'][$name]);
1747  
1748      if(is_array($cookie) && isset($cookie[$id]))
1749      {
1750          return $cookie[$id];
1751      }
1752      else
1753      {
1754          return 0;
1755      }
1756  }
1757  
1758  /**
1759   * Set a serialised cookie array.
1760   *
1761   * @param string The cookie identifier.
1762   * @param int The cookie content id.
1763   * @param string The value to set the cookie to.
1764   */
1765  function my_set_array_cookie($name, $id, $value, $expires="")
1766  {
1767      global $mybb;
1768  
1769      $cookie = $mybb->cookies['mybb'];
1770      $newcookie = my_unserialize($cookie[$name]);
1771  
1772      $newcookie[$id] = $value;
1773      $newcookie = serialize($newcookie);
1774      my_setcookie("mybb[$name]", addslashes($newcookie), $expires);
1775  
1776      // Make sure our current viarables are up-to-date as well
1777      $mybb->cookies['mybb'][$name] = $newcookie;
1778  }
1779  
1780  /**
1781   * Verifies that data passed is an array
1782   *
1783   * @param array Data to unserialize
1784   * @return array Unserialized data array
1785   */
1786  function my_unserialize($data)
1787  {
1788      $array = unserialize($data);
1789  
1790      if(!is_array($array))
1791      {
1792          $array = array();
1793      }
1794  
1795      return $array;
1796  }
1797  
1798  /**
1799   * Returns the serverload of the system.
1800   *
1801   * @return int The serverload of the system.
1802   */
1803  function get_server_load()
1804  {
1805      global $lang;
1806  
1807      $serverload = array();
1808  
1809      // DIRECTORY_SEPARATOR checks if running windows
1810      if(DIRECTORY_SEPARATOR != '\\')
1811      {
1812          if(function_exists("sys_getloadavg"))
1813          {
1814              // sys_getloadavg() will return an array with [0] being load within the last minute.
1815              $serverload = sys_getloadavg();
1816              $serverload[0] = round($serverload[0], 4);
1817          }
1818          else if(@file_exists("/proc/loadavg") && $load = @file_get_contents("/proc/loadavg"))
1819          {
1820              $serverload = explode(" ", $load);
1821              $serverload[0] = round($serverload[0], 4);
1822          }
1823          if(!is_numeric($serverload[0]))
1824          {
1825              if(@ini_get('safe_mode') == 'On')
1826              {
1827                  return $lang->unknown;
1828              }
1829  
1830              // Suhosin likes to throw a warning if exec is disabled then die - weird
1831              if($func_blacklist = @ini_get('suhosin.executor.func.blacklist'))
1832              {
1833                  if(strpos(",".$func_blacklist.",", 'exec') !== false)
1834                  {
1835                      return $lang->unknown;
1836                  }
1837              }
1838              // PHP disabled functions?
1839              if($func_blacklist = @ini_get('disable_functions'))
1840              {
1841                  if(strpos(",".$func_blacklist.",", 'exec') !== false)
1842                  {
1843                      return $lang->unknown;
1844                  }
1845              }
1846  
1847              $load = @exec("uptime");
1848              $load = explode("load average: ", $load);
1849              $serverload = explode(",", $load[1]);
1850              if(!is_array($serverload))
1851              {
1852                  return $lang->unknown;
1853              }
1854          }
1855      }
1856      else
1857      {
1858          return $lang->unknown;
1859      }
1860  
1861      $returnload = trim($serverload[0]);
1862  
1863      return $returnload;
1864  }
1865  
1866  /**
1867   * Returns the amount of memory allocated to the script.
1868   *
1869   * @return int The amount of memory allocated to the script.
1870   */
1871  function get_memory_usage()
1872  {
1873      if(function_exists('memory_get_peak_usage'))
1874      {
1875          return memory_get_peak_usage(true);
1876      }
1877      elseif(function_exists('memory_get_usage'))
1878      {
1879          return memory_get_usage(true);
1880      }
1881      return false;
1882  }
1883  
1884  /**
1885   * Updates the forum statistics with specific values (or addition/subtraction of the previous value)
1886   *
1887   * @param array Array of items being updated (numthreads,numposts,numusers)
1888   */
1889  function update_stats($changes=array())
1890  {
1891      global $cache, $db;
1892  
1893      $stats = $cache->read("stats");
1894  
1895      $counters = array('numthreads','numunapprovedthreads','numposts','numunapprovedposts','numusers');
1896      $update = array();
1897      foreach($counters as $counter)
1898      {
1899          if(array_key_exists($counter, $changes))
1900          {
1901              // Adding or subtracting from previous value?
1902              if(substr($changes[$counter], 0, 1) == "+" || substr($changes[$counter], 0, 1) == "-")
1903              {
1904                  if(intval($changes[$counter]) != 0)
1905                  {
1906                      $new_stats[$counter] = $stats[$counter] + $changes[$counter];
1907                  }
1908              }
1909              else
1910              {
1911                  $new_stats[$counter] = $changes[$counter];
1912              }
1913              // Less than 0? That's bad
1914              if($new_stats[$counter] < 0)
1915              {
1916                  $new_stats[$counter] = 0;
1917              }
1918          }
1919      }
1920  
1921      // Fetch latest user if the user count is changing
1922      if(array_key_exists('numusers', $changes))
1923      {
1924          $query = $db->simple_select("users", "uid, username", "", array('order_by' => 'regdate', 'order_dir' => 'DESC', 'limit' => 1));
1925          $lastmember = $db->fetch_array($query);
1926          $new_stats['lastuid'] = $lastmember['uid'];
1927          $new_stats['lastusername'] = $lastmember['username'];
1928      }
1929  
1930      if(empty($new_stats))
1931      {
1932          return;
1933      }
1934  
1935      if(is_array($stats))
1936      {
1937          $stats = array_merge($stats, $new_stats);
1938      }
1939      else
1940      {
1941          $stats = $new_stats;
1942      }
1943  
1944      // Update stats row for today in the database
1945      $todays_stats = array(
1946          "dateline" => mktime(0, 0, 0, date("m"), date("j"), date("Y")),
1947          "numusers" => $stats['numusers'],
1948          "numthreads" => $stats['numthreads'],
1949          "numposts" => $stats['numposts']
1950      );
1951      $db->replace_query("stats", $todays_stats, "dateline");
1952  
1953      $cache->update("stats", $stats, "dateline");
1954  }
1955  
1956  /**
1957   * Updates the forum counters with a specific value (or addition/subtraction of the previous value)
1958   *
1959   * @param int The forum ID
1960   * @param array Array of items being updated (threads, posts, unapprovedthreads, unapprovedposts) and their value (ex, 1, +1, -1)
1961   */
1962  function update_forum_counters($fid, $changes=array())
1963  {
1964      global $db, $cache;
1965  
1966      $update_query = array();
1967  
1968      $counters = array('threads','unapprovedthreads','posts','unapprovedposts');
1969  
1970      // Fetch above counters for this forum
1971      $query = $db->simple_select("forums", implode(",", $counters), "fid='{$fid}'");
1972      $forum = $db->fetch_array($query);
1973  
1974      foreach($counters as $counter)
1975      {
1976          if(array_key_exists($counter, $changes))
1977          {
1978              // Adding or subtracting from previous value?
1979              if(substr($changes[$counter], 0, 1) == "+" || substr($changes[$counter], 0, 1) == "-")
1980              {
1981                  $update_query[$counter] = $forum[$counter] + $changes[$counter];
1982              }
1983              else
1984              {
1985                  $update_query[$counter] = $changes[$counter];
1986              }
1987  
1988              // Less than 0? That's bad
1989              if(!$update_query[$counter])
1990              {
1991                  $update_query[$counter] = 0;
1992              }
1993          }
1994      }
1995  
1996      // Only update if we're actually doing something
1997      if(count($update_query) > 0)
1998      {
1999          $db->update_query("forums", $update_query, "fid='".intval($fid)."'");
2000      }
2001  
2002      // Guess we should update the statistics too?
2003      if(isset($update_query['threads']) || isset($update_query['posts']) || isset($update_query['unapprovedthreads']) || isset($update_query['unapprovedposts']))
2004      {
2005          $new_stats = array();
2006          if(array_key_exists('threads', $update_query))
2007          {
2008              $threads_diff = $update_query['threads'] - $forum['threads'];
2009              if($threads_diff > -1)
2010              {
2011                  $new_stats['numthreads'] = "+{$threads_diff}";
2012              }
2013              else
2014              {
2015                  $new_stats['numthreads'] = "{$threads_diff}";
2016              }
2017          }
2018  
2019          if(array_key_exists('unapprovedthreads', $update_query))
2020          {
2021              $unapprovedthreads_diff = $update_query['unapprovedthreads'] - $forum['unapprovedthreads'];
2022              if($unapprovedthreads_diff > -1)
2023              {
2024                  $new_stats['numunapprovedthreads'] = "+{$unapprovedthreads_diff}";
2025              }
2026              else
2027              {
2028                  $new_stats['numunapprovedthreads'] = "{$unapprovedthreads_diff}";
2029              }
2030          }
2031  
2032          if(array_key_exists('posts', $update_query))
2033          {
2034              $posts_diff = $update_query['posts'] - $forum['posts'];
2035              if($posts_diff > -1)
2036              {
2037                  $new_stats['numposts'] = "+{$posts_diff}";
2038              }
2039              else
2040              {
2041                  $new_stats['numposts'] = "{$posts_diff}";
2042              }
2043          }
2044  
2045          if(array_key_exists('unapprovedposts', $update_query))
2046          {
2047              $unapprovedposts_diff = $update_query['unapprovedposts'] - $forum['unapprovedposts'];
2048              if($unapprovedposts_diff > -1)
2049              {
2050                  $new_stats['numunapprovedposts'] = "+{$unapprovedposts_diff}";
2051              }
2052              else
2053              {
2054                  $new_stats['numunapprovedposts'] = "{$unapprovedposts_diff}";
2055              }
2056          }
2057          update_stats($new_stats);
2058      }
2059  
2060      // Update last post info
2061      update_forum_lastpost($fid);
2062  
2063      $cache->update_forums();
2064  }
2065  
2066  /**
2067   * Update the last post information for a specific forum
2068   *
2069   * @param int The forum ID
2070   */
2071  function update_forum_lastpost($fid)
2072  {
2073      global $db;
2074  
2075      // Fetch the last post for this forum
2076      $query = $db->query("
2077          SELECT tid, lastpost, lastposter, lastposteruid, subject
2078          FROM ".TABLE_PREFIX."threads
2079          WHERE fid='{$fid}' AND visible='1' AND closed NOT LIKE 'moved|%'
2080          ORDER BY lastpost DESC
2081          LIMIT 0, 1
2082      ");
2083      $lastpost = $db->fetch_array($query);
2084  
2085      $updated_forum = array(
2086          "lastpost" => intval($lastpost['lastpost']),
2087          "lastposter" => $db->escape_string($lastpost['lastposter']),
2088          "lastposteruid" => intval($lastpost['lastposteruid']),
2089          "lastposttid" => intval($lastpost['tid']),
2090          "lastpostsubject" => $db->escape_string($lastpost['subject'])
2091      );
2092  
2093      $db->update_query("forums", $updated_forum, "fid='{$fid}'");
2094  }
2095  
2096  /**
2097   * Updates the thread counters with a specific value (or addition/subtraction of the previous value)
2098   *
2099   * @param int The thread ID
2100   * @param array Array of items being updated (replies, unapprovedposts, attachmentcount) and their value (ex, 1, +1, -1)
2101   */
2102  function update_thread_counters($tid, $changes=array())
2103  {
2104      global $db;
2105  
2106      $update_query = array();
2107  
2108      $counters = array('replies','unapprovedposts','attachmentcount', 'attachmentcount');
2109  
2110      // Fetch above counters for this thread
2111      $query = $db->simple_select("threads", implode(",", $counters), "tid='{$tid}'");
2112      $thread = $db->fetch_array($query);
2113  
2114      foreach($counters as $counter)
2115      {
2116          if(array_key_exists($counter, $changes))
2117          {
2118              // Adding or subtracting from previous value?
2119              if(substr($changes[$counter], 0, 1) == "+" || substr($changes[$counter], 0, 1) == "-")
2120              {
2121                  $update_query[$counter] = $thread[$counter] + $changes[$counter];
2122              }
2123              else
2124              {
2125                  $update_query[$counter] = $changes[$counter];
2126              }
2127  
2128              // Less than 0? That's bad
2129              if($update_query[$counter] < 0)
2130              {
2131                  $update_query[$counter] = 0;
2132              }
2133          }
2134      }
2135  
2136      $db->free_result($query);
2137  
2138      // Only update if we're actually doing something
2139      if(count($update_query) > 0)
2140      {
2141          $db->update_query("threads", $update_query, "tid='".intval($tid)."'");
2142      }
2143  
2144      unset($update_query, $thread);
2145  
2146      update_thread_data($tid);
2147  }
2148  
2149  /**
2150   * Update the first post and lastpost data for a specific thread
2151   *
2152   * @param int The thread ID
2153   */
2154  function update_thread_data($tid)
2155  {
2156      global $db;
2157  
2158      $thread = get_thread($tid);
2159  
2160      // If this is a moved thread marker, don't update it - we need it to stay as it is
2161      if(strpos($thread['closed'], 'moved|') !== false)
2162      {
2163          return false;
2164      }
2165  
2166      $query = $db->query("
2167          SELECT u.uid, u.username, p.username AS postusername, p.dateline
2168          FROM ".TABLE_PREFIX."posts p
2169          LEFT JOIN ".TABLE_PREFIX."users u ON (u.uid=p.uid)
2170          WHERE p.tid='$tid' AND p.visible='1'
2171          ORDER BY p.dateline DESC
2172          LIMIT 1"
2173      );
2174      $lastpost = $db->fetch_array($query);
2175  
2176      $db->free_result($query);
2177  
2178      $query = $db->query("
2179          SELECT u.uid, u.username, p.username AS postusername, p.dateline
2180          FROM ".TABLE_PREFIX."posts p
2181          LEFT JOIN ".TABLE_PREFIX."users u ON (u.uid=p.uid)
2182          WHERE p.tid='$tid'
2183          ORDER BY p.dateline ASC
2184          LIMIT 1
2185      ");
2186      $firstpost = $db->fetch_array($query);
2187  
2188      $db->free_result($query);
2189  
2190      if(!$firstpost['username'])
2191      {
2192          $firstpost['username'] = $firstpost['postusername'];
2193      }
2194  
2195      if(!$lastpost['username'])
2196      {
2197          $lastpost['username'] = $lastpost['postusername'];
2198      }
2199  
2200      if(!$lastpost['dateline'])
2201      {
2202          $lastpost['username'] = $firstpost['username'];
2203          $lastpost['uid'] = $firstpost['uid'];
2204          $lastpost['dateline'] = $firstpost['dateline'];
2205      }
2206  
2207      $lastpost['username'] = $db->escape_string($lastpost['username']);
2208      $firstpost['username'] = $db->escape_string($firstpost['username']);
2209  
2210      $update_array = array(
2211          'username' => $firstpost['username'],
2212          'uid' => intval($firstpost['uid']),
2213          'dateline' => intval($firstpost['dateline']),
2214          'lastpost' => intval($lastpost['dateline']),
2215          'lastposter' => $lastpost['username'],
2216          'lastposteruid' => intval($lastpost['uid']),
2217      );
2218      $db->update_query("threads", $update_array, "tid='{$tid}'");
2219  
2220      unset($firstpost, $lastpost, $update_array);
2221  }
2222  
2223  function update_forum_count($fid)
2224  {
2225      die("Deprecated function call: update_forum_count");
2226  }
2227  function update_thread_count($tid)
2228  {
2229      die("Deprecated function call: update_thread_count");
2230  }
2231  function update_thread_attachment_count($tid)
2232  {
2233      die("Deprecated function call: update_thread_attachment_count");
2234  }
2235  
2236  /**
2237   * Deletes a thread from the database
2238   *
2239   * @param int The thread ID
2240   */
2241  function delete_thread($tid)
2242  {
2243      global $moderation;
2244  
2245      if(!is_object($moderation))
2246      {
2247          require_once  MYBB_ROOT."inc/class_moderation.php";
2248          $moderation = new Moderation;
2249      }
2250  
2251      return $moderation->delete_thread($tid);
2252  }
2253  
2254  /**
2255   * Deletes a post from the database
2256   *
2257   * @param int The thread ID
2258   */
2259  function delete_post($pid, $tid="")
2260  {
2261      global $moderation;
2262  
2263      if(!is_object($moderation))
2264      {
2265          require_once  MYBB_ROOT."inc/class_moderation.php";
2266          $moderation = new Moderation;
2267      }
2268  
2269      return $moderation->delete_post($pid);
2270  }
2271  
2272  /**
2273   * Builds a forum jump menu
2274   *
2275   * @param int The parent forum to start with
2276   * @param int The selected item ID
2277   * @param int If we need to add select boxes to this cal or not
2278   * @param int The current depth of forums we're at
2279   * @param int Whether or not to show extra items such as User CP, Forum home
2280   * @param boolean Ignore the showinjump setting and show all forums (for moderation pages)
2281   * @param array Array of permissions
2282   * @param string The name of the forum jump
2283   * @return string Forum jump items
2284   */
2285  function build_forum_jump($pid="0", $selitem="", $addselect="1", $depth="", $showextras="1", $showall=false, $permissions="", $name="fid")
2286  {
2287      global $forum_cache, $jumpfcache, $permissioncache, $mybb, $selecteddone, $forumjump, $forumjumpbits, $gobutton, $theme, $templates, $lang;
2288  
2289      $pid = intval($pid);
2290      $jumpsel['default'] = '';
2291  
2292      if($permissions)
2293      {
2294          $permissions = $mybb->usergroup;
2295      }
2296  
2297      if(!is_array($jumpfcache))
2298      {
2299          if(!is_array($forum_cache))
2300          {
2301              cache_forums();
2302          }
2303  
2304          foreach($forum_cache as $fid => $forum)
2305          {
2306              if($forum['active'] != 0)
2307              {
2308                  $jumpfcache[$forum['pid']][$forum['disporder']][$forum['fid']] = $forum;
2309              }
2310          }
2311      }
2312  
2313      if(!is_array($permissioncache))
2314      {
2315          $permissioncache = forum_permissions();
2316      }
2317  
2318      if(isset($jumpfcache[$pid]) && is_array($jumpfcache[$pid]))
2319      {
2320          foreach($jumpfcache[$pid] as $main)
2321          {
2322              foreach($main as $forum)
2323              {
2324                  $perms = $permissioncache[$forum['fid']];
2325  
2326                  if($forum['fid'] != "0" && ($perms['canview'] != 0 || $mybb->settings['hideprivateforums'] == 0) && $forum['linkto'] == '' && ($forum['showinjump'] != 0 || $showall == true))
2327                  {
2328                      $optionselected = "";
2329  
2330                      if($selitem == $forum['fid'])
2331                      {
2332                          $optionselected = "selected=\"selected\"";
2333                          $selecteddone = 1;
2334                      }
2335  
2336                      $forum['name'] = htmlspecialchars_uni(strip_tags($forum['name']));
2337  
2338                      eval("\$forumjumpbits .= \"".$templates->get("forumjump_bit")."\";");
2339  
2340                      if($forum_cache[$forum['fid']])
2341                      {
2342                          $newdepth = $depth."--";
2343                          $forumjumpbits .= build_forum_jump($forum['fid'], $selitem, 0, $newdepth, $showextras, $showall);
2344                      }
2345                  }
2346              }
2347          }
2348      }
2349  
2350      if($addselect)
2351      {
2352          if(!$selecteddone)
2353          {
2354              if(!$selitem)
2355              {
2356                  $selitem = "default";
2357              }
2358  
2359              $jumpsel[$selitem] = 'selected="selected"';
2360          }
2361  
2362          if($showextras == 0)
2363          {
2364              $template = "special";
2365          }
2366          else
2367          {
2368              $template = "advanced";
2369  
2370              if(strpos(FORUM_URL, '.html') !== false)
2371              {
2372                  $forum_link = "'".str_replace('{fid}', "'+this.options[this.selectedIndex].value+'", FORUM_URL)."'";
2373              }
2374              else
2375              {
2376                  $forum_link = "'".str_replace('{fid}', "'+this.options[this.selectedIndex].value", FORUM_URL);
2377              }
2378          }
2379  
2380          eval("\$forumjump = \"".$templates->get("forumjump_".$template)."\";");
2381      }
2382  
2383      return $forumjump;
2384  }
2385  
2386  /**
2387   * Returns the extension of a file.
2388   *
2389   * @param string The filename.
2390   * @return string The extension of the file.
2391   */
2392  function get_extension($file)
2393  {
2394      return my_strtolower(my_substr(strrchr($file, "."), 1));
2395  }
2396  
2397  /**
2398   * Generates a random string.
2399   *
2400   * @param int The length of the string to generate.
2401   * @return string The random string.
2402   */
2403  function random_str($length="8")
2404  {
2405      $set = array("a","A","b","B","c","C","d","D","e","E","f","F","g","G","h","H","i","I","j","J","k","K","l","L","m","M","n","N","o","O","p","P","q","Q","r","R","s","S","t","T","u","U","v","V","w","W","x","X","y","Y","z","Z","1","2","3","4","5","6","7","8","9");
2406      $str = '';
2407  
2408      for($i = 1; $i <= $length; ++$i)
2409      {
2410          $ch = my_rand(0, count($set)-1);
2411          $str .= $set[$ch];
2412      }
2413  
2414      return $str;
2415  }
2416  
2417  /**
2418   * Formats a username based on their display group
2419   *
2420   * @param string The username
2421   * @param int The usergroup for the user (if not specified, will be fetched)
2422   * @param int The display group for the user (if not specified, will be fetched)
2423   * @return string The formatted username
2424   */
2425  function format_name($username, $usergroup, $displaygroup="")
2426  {
2427      global $groupscache, $cache;
2428  
2429      if(!is_array($groupscache))
2430      {
2431          $groupscache = $cache->read("usergroups");
2432      }
2433  
2434      if($displaygroup != 0)
2435      {
2436          $usergroup = $displaygroup;
2437      }
2438  
2439      $ugroup = $groupscache[$usergroup];
2440      $format = $ugroup['namestyle'];
2441      $userin = substr_count($format, "{username}");
2442  
2443      if($userin == 0)
2444      {
2445          $format = "{username}";
2446      }
2447  
2448      $format = stripslashes($format);
2449  
2450      return str_replace("{username}", $username, $format);
2451  }
2452  
2453  /**
2454   * Build the javascript based MyCode inserter
2455   *
2456   * @return string The MyCode inserter
2457   */
2458  function build_mycode_inserter($bind="message")
2459  {
2460      global $db, $mybb, $theme, $templates, $lang, $plugins;
2461  
2462      if($mybb->settings['bbcodeinserter'] != 0)
2463      {
2464          $editor_lang_strings = array(
2465              "editor_title_bold",
2466              "editor_title_italic",
2467              "editor_title_underline",
2468              "editor_title_left",
2469              "editor_title_center",
2470              "editor_title_right",
2471              "editor_title_justify",
2472              "editor_title_numlist",
2473              "editor_title_bulletlist",
2474              "editor_title_image",
2475              "editor_title_hyperlink",
2476              "editor_title_email",
2477              "editor_title_quote",
2478              "editor_title_code",
2479              "editor_title_php",
2480              "editor_title_close_tags",
2481              "editor_enter_list_item",
2482              "editor_enter_url",
2483              "editor_enter_url_title",
2484              "editor_enter_email",
2485              "editor_enter_email_title",
2486              "editor_enter_image",
2487              "editor_enter_video_url",
2488              "editor_video_dailymotion",
2489              "editor_video_metacafe",
2490              "editor_video_myspacetv",
2491              "editor_video_vimeo",
2492              "editor_video_yahoo",
2493              "editor_video_youtube",
2494              "editor_size_xx_small",
2495              "editor_size_x_small",
2496              "editor_size_small",
2497              "editor_size_medium",
2498              "editor_size_large",
2499              "editor_size_x_large",
2500              "editor_size_xx_large",
2501              "editor_font",
2502              "editor_size",
2503              "editor_color"
2504          );
2505          $editor_language = "var editor_language = {\n";
2506  
2507          $editor_lang_strings = $plugins->run_hooks("mycode_add_codebuttons", $editor_lang_strings);
2508  
2509          foreach($editor_lang_strings as $key => $lang_string)
2510          {
2511              // Strip initial editor_ off language string if it exists - ensure case sensitivity does not matter.
2512              $js_lang_string = preg_replace("#^editor_#i", "", $lang_string);
2513              $string = str_replace("\"", "\\\"", $lang->$lang_string);
2514              $editor_language .= "\t{$js_lang_string}: \"{$string}\"";
2515  
2516              if(isset($editor_lang_strings[$key+1]))
2517              {
2518                  $editor_language .= ",";
2519              }
2520  
2521              $editor_language .= "\n";
2522          }
2523  
2524          $editor_language .= "};";
2525  
2526          if(defined("IN_ADMINCP"))
2527          {
2528              global $page;
2529              $codeinsert = $page->build_codebuttons_editor($bind, $editor_language);
2530          }
2531          else
2532          {
2533              eval("\$codeinsert = \"".$templates->get("codebuttons")."\";");
2534          }
2535      }
2536  
2537      return $codeinsert;
2538  }
2539  
2540  /**
2541   * Build the javascript clickable smilie inserter
2542   *
2543   * @return string The clickable smilies list
2544   */
2545  function build_clickable_smilies()
2546  {
2547      global $cache, $smiliecache, $theme, $templates, $lang, $mybb, $smiliecount;
2548  
2549      if($mybb->settings['smilieinserter'] != 0 && $mybb->settings['smilieinsertercols'] && $mybb->settings['smilieinsertertot'])
2550      {
2551          if(!$smiliecount)
2552          {
2553              $smilie_cache = $cache->read("smilies");
2554              $smiliecount = count($smilie_cache);
2555          }
2556  
2557          if(!$smiliecache)
2558          {
2559              if(!is_array($smilie_cache))
2560              {
2561                  $smilie_cache = $cache->read("smilies");
2562              }
2563              foreach($smilie_cache as $smilie)
2564              {
2565                  if($smilie['showclickable'] != 0)
2566                  {
2567                      $smiliecache[$smilie['find']] = $smilie['image'];
2568                  }
2569              }
2570          }
2571  
2572          unset($smilie);
2573  
2574          if(is_array($smiliecache))
2575          {
2576              reset($smiliecache);
2577  
2578              $getmore = '';
2579              if($mybb->settings['smilieinsertertot'] >= $smiliecount)
2580              {
2581                  $mybb->settings['smilieinsertertot'] = $smiliecount;
2582              }
2583              else if($mybb->settings['smilieinsertertot'] < $smiliecount)
2584              {
2585                  $smiliecount = $mybb->settings['smilieinsertertot'];
2586                  eval("\$getmore = \"".$templates->get("smilieinsert_getmore")."\";");
2587              }
2588  
2589              $smilies = "";
2590              $counter = 0;
2591              $i = 0;
2592  
2593              foreach($smiliecache as $find => $image)
2594              {
2595                  if($i < $mybb->settings['smilieinsertertot'])
2596                  {
2597                      if($counter == 0)
2598                      {
2599                          $smilies .=  "<tr>\n";
2600                      }
2601  
2602                      $find = htmlspecialchars_uni($find);
2603                      $smilies .= "<td style=\"text-align: center\"><img src=\"{$image}\" border=\"0\" class=\"smilie\" alt=\"{$find}\" /></td>\n";
2604                      ++$i;
2605                      ++$counter;
2606  
2607                      if($counter == $mybb->settings['smilieinsertercols'])
2608                      {
2609                          $counter = 0;
2610                          $smilies .= "</tr>\n";
2611                      }
2612                  }
2613              }
2614  
2615              if($counter != 0)
2616              {
2617                  $colspan = $mybb->settings['smilieinsertercols'] - $counter;
2618                  $smilies .= "<td colspan=\"{$colspan}\">&nbsp;</td>\n</tr>\n";
2619              }
2620  
2621              eval("\$clickablesmilies = \"".$templates->get("smilieinsert")."\";");
2622          }
2623          else
2624          {
2625              $clickablesmilies = "";
2626          }
2627      }
2628      else
2629      {
2630          $clickablesmilies = "";
2631      }
2632  
2633      return $clickablesmilies;
2634  }
2635  
2636  /**
2637   * Builds thread prefixes and returns a selected prefix (or all)
2638   *
2639   *  @param int The prefix ID (0 to return all)
2640   *  @return array The thread prefix's values (or all thread prefixes)
2641   */
2642  function build_prefixes($pid=0)
2643  {
2644      global $cache;
2645      static $prefixes_cache;
2646  
2647      if(is_array($prefixes_cache))
2648      {
2649          if($pid > 0 && is_array($prefixes_cache[$pid]))
2650          {
2651              return $prefixes_cache[$pid];
2652          }
2653  
2654          return $prefixes_cache;
2655      }
2656  
2657      $prefix_cache = $cache->read("threadprefixes");
2658  
2659      if(!is_array($prefix_cache))
2660      {
2661          // No cache
2662          $prefix_cache = $cache->read("threadprefixes", true);
2663  
2664          if(!is_array($prefix_cache))
2665          {
2666              return array();
2667          }
2668      }
2669  
2670      $prefixes_cache = array();
2671      foreach($prefix_cache as $prefix)
2672      {
2673          $prefixes_cache[$prefix['pid']] = $prefix;
2674      }
2675  
2676      if($pid != 0 && is_array($prefixes_cache[$pid]))
2677      {
2678          return $prefixes_cache[$pid];
2679      }
2680      else if(!empty($prefixes_cache))
2681      {
2682          return $prefixes_cache;
2683      }
2684  
2685      return false;
2686  }
2687  
2688  /**
2689   * Build the thread prefix selection menu
2690   *
2691   *  @param mixed The forum ID (integer ID or string all)
2692   *  @param mixed The selected prefix ID (integer ID or string any)
2693   *  @return string The thread prefix selection menu
2694   */
2695  function build_prefix_select($fid, $selected_pid=0, $multiple=0)
2696  {
2697      global $cache, $db, $lang, $mybb;
2698  
2699      if($fid != 'all')
2700      {
2701          $fid = intval($fid);
2702      }
2703  
2704      $prefix_cache = build_prefixes(0);
2705      if(!$prefix_cache)
2706      {
2707          return false; // We've got no prefixes to show
2708      }
2709  
2710      $groups = array($mybb->user['usergroup']);
2711      if($mybb->user['additionalgroups'])
2712      {
2713          $exp = explode(",", $mybb->user['additionalgroups']);
2714  
2715          foreach($exp as $group)
2716          {
2717              $groups[] = $group;
2718          }
2719      }
2720  
2721      // Go through each of our prefixes and decide which ones we can use
2722      $prefixes = array();
2723      foreach($prefix_cache as $prefix)
2724      {
2725          if($fid != "all" && $prefix['forums'] != "-1")
2726          {
2727              // Decide whether this prefix can be used in our forum
2728              $forums = explode(",", $prefix['forums']);
2729  
2730              if(!in_array($fid, $forums))
2731              {
2732                  // This prefix is not in our forum list
2733                  continue;
2734              }
2735          }
2736  
2737          if($prefix['groups'] != "-1")
2738          {
2739              $prefix_groups = explode(",", $prefix['groups']);
2740  
2741              foreach($groups as $group)
2742              {
2743                  if(in_array($group, $prefix_groups) && !isset($prefixes[$prefix['pid']]))
2744                  {
2745                      // Our group can use this prefix!
2746                      $prefixes[$prefix['pid']] = $prefix;
2747                  }
2748              }
2749          }
2750          else
2751          {
2752              // This prefix is for anybody to use...
2753              $prefixes[$prefix['pid']] = $prefix;
2754          }
2755      }
2756  
2757      if(empty($prefixes))
2758      {
2759          return false;
2760      }
2761  
2762      $prefixselect = "";
2763      $multipleselect = "";
2764      if($multiple != 0)
2765      {
2766          $multipleselect = " multiple=\"multiple\" size=\"5\"";
2767      }
2768  
2769      $prefixselect = "<select name=\"threadprefix\"{$multipleselect}>\n";
2770  
2771      if($multiple == 1)
2772      {
2773          $any_selected = "";
2774          if($selected_pid == 'any')
2775          {
2776              $any_selected = " selected=\"selected\"";
2777          }
2778  
2779          $prefixselect .= "<option value=\"any\"".$any_selected.">".$lang->any_prefix."</option>\n";
2780      }
2781  
2782      $default_selected = "";
2783      if((intval($selected_pid) == 0) && $selected_pid != 'any')
2784      {
2785          $default_selected = " selected=\"selected\"";
2786      }
2787  
2788      $prefixselect .= "<option value=\"0\"".$default_selected.">".$lang->no_prefix."</option>\n";
2789  
2790      foreach($prefixes as $prefix)
2791      {
2792          $selected = "";
2793          if($prefix['pid'] == $selected_pid)
2794          {
2795              $selected = " selected=\"selected\"";
2796          }
2797  
2798          $prefixselect .= "<option value=\"".$prefix['pid']."\"".$selected.">".htmlspecialchars_uni($prefix['prefix'])."</option>\n";
2799      }
2800  
2801      $prefixselect .= "</select>\n&nbsp;";
2802  
2803      return $prefixselect;
2804  }
2805  
2806  /**
2807   * Gzip encodes text to a specified level
2808   *
2809   * @param string The string to encode
2810   * @param int The level (1-9) to encode at
2811   * @return string The encoded string
2812   */
2813  function gzip_encode($contents, $level=1)
2814  {
2815      if(function_exists("gzcompress") && function_exists("crc32") && !headers_sent() && !(ini_get('output_buffering') && my_strpos(' '.ini_get('output_handler'), 'ob_gzhandler')))
2816      {
2817          $httpaccept_encoding = '';
2818  
2819          if(isset($_SERVER['HTTP_ACCEPT_ENCODING']))
2820          {
2821              $httpaccept_encoding = $_SERVER['HTTP_ACCEPT_ENCODING'];
2822          }
2823  
2824          if(my_strpos(" ".$httpaccept_encoding, "x-gzip"))
2825          {
2826              $encoding = "x-gzip";
2827          }
2828  
2829          if(my_strpos(" ".$httpaccept_encoding, "gzip"))
2830          {
2831              $encoding = "gzip";
2832          }
2833  
2834          if(isset($encoding))
2835          {
2836              header("Content-Encoding: $encoding");
2837  
2838              if(function_exists("gzencode"))
2839              {
2840                  $contents = gzencode($contents, $level);
2841              }
2842              else
2843              {
2844                  $size = strlen($contents);
2845                  $crc = crc32($contents);
2846                  $gzdata = "\x1f\x8b\x08\x00\x00\x00\x00\x00\x00\xff";
2847                  $gzdata .= my_substr(gzcompress($contents, $level), 2, -4);
2848                  $gzdata .= pack("V", $crc);
2849                  $gzdata .= pack("V", $size);
2850                  $contents = $gzdata;
2851              }
2852          }
2853      }
2854  
2855      return $contents;
2856  }
2857  
2858  /**
2859   * Log the actions of a moderator.
2860   *
2861   * @param array The data of the moderator's action.
2862   * @param string The message to enter for the action the moderator performed.
2863   */
2864  function log_moderator_action($data, $action="")
2865  {
2866      global $mybb, $db, $session;
2867  
2868      // If the fid or tid is not set, set it at 0 so MySQL doesn't choke on it.
2869      if($data['fid'] == '')
2870      {
2871          $fid = 0;
2872      }
2873      else
2874      {
2875          $fid = $data['fid'];
2876          unset($data['fid']);
2877      }
2878  
2879      if($data['tid'] == '')
2880      {
2881          $tid = 0;
2882      }
2883      else
2884      {
2885          $tid = $data['tid'];
2886          unset($data['tid']);
2887      }
2888  
2889      // Any remaining extra data - we serialize and insert in to its own column
2890      if(is_array($data))
2891      {
2892          $data = serialize($data);
2893      }
2894  
2895      $time = TIME_NOW;
2896  
2897      $sql_array = array(
2898          "uid" => $mybb->user['uid'],
2899          "dateline" => $time,
2900          "fid" => $fid,
2901          "tid" => $tid,
2902          "action" => $db->escape_string($action),
2903          "data" => $db->escape_string($data),
2904          "ipaddress" => $db->escape_string($session->ipaddress)
2905      );
2906      $db->insert_query("moderatorlog", $sql_array);
2907  }
2908  
2909  /**
2910   * Get the formatted reputation for a user.
2911   *
2912   * @param int The reputation value
2913   * @param int The user ID (if not specified, the generated reputation will not be a link)
2914   * @return string The formatted repuation
2915   */
2916  function get_reputation($reputation, $uid=0)
2917  {
2918      global $theme;
2919  
2920      $display_reputation = '';
2921  
2922      if($uid != 0)
2923      {
2924          $display_reputation = "<a href=\"reputation.php?uid={$uid}\">";
2925      }
2926  
2927      $display_reputation .= "<strong class=\"";
2928  
2929      if($reputation < 0)
2930      {
2931          $display_reputation .= "reputation_negative";
2932      }
2933      elseif($reputation > 0)
2934      {
2935          $display_reputation .= "reputation_positive";
2936      }
2937      else
2938      {
2939          $display_reputation .= "reputation_neutral";
2940      }
2941  
2942      $display_reputation .= "\">{$reputation}</strong>";
2943  
2944      if($uid != 0)
2945      {
2946          $display_reputation .= "</a>";
2947      }
2948  
2949      return $display_reputation;
2950  }
2951  
2952  /**
2953   * Fetch a color coded version of a warning level (based on it's percentage)
2954   *
2955   * @param int The warning level (percentage of 100)
2956   * @return string Formatted warning level
2957   */
2958  function get_colored_warning_level($level)
2959  {
2960      if($level >= 80)
2961      {
2962          return "<span class=\"high_warning\">{$level}%</span>";
2963      }
2964      else if($level >= 50)
2965      {
2966          return "<span class=\"moderate_warning\">{$level}%</span>";
2967      }
2968      else if($level >= 25)
2969      {
2970          return "<span class=\"low_warning\">{$level}%</span>";
2971      }
2972      else
2973      {
2974          return $level."%";
2975      }
2976  }
2977  
2978  /**
2979   * Fetch the IP address of the current user.
2980   *
2981   * @return string The IP address.
2982   */
2983  function get_ip()
2984  {
2985      global $mybb, $plugins;
2986  
2987      $ip = 0;
2988  
2989      if(!preg_match("#^(10|172\.16|192\.168)\.#", $_SERVER['REMOTE_ADDR']))
2990      {
2991          $ip = $_SERVER['REMOTE_ADDR'];
2992      }
2993  
2994      if($mybb->settings['ip_forwarded_check'])
2995      {
2996          if(isset($_SERVER['HTTP_X_FORWARDED_FOR']))
2997          {
2998              preg_match_all("#[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}#s", $_SERVER['HTTP_X_FORWARDED_FOR'], $addresses);
2999          }
3000          elseif(isset($_SERVER['HTTP_X_REAL_IP']))
3001          {
3002              preg_match_all("#[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}#s", $_SERVER['HTTP_X_REAL_IP'], $addresses);
3003          }
3004  
3005          if(is_array($addresses[0]))
3006          {
3007              foreach($addresses[0] as $key => $val)
3008              {
3009                  if(!preg_match("#^(10|172\.16|192\.168)\.#", $val))
3010                  {
3011                      $ip = $val;
3012                      break;
3013                  }
3014              }
3015          }
3016      }
3017  
3018      if(!$ip)
3019      {
3020          if(isset($_SERVER['HTTP_CLIENT_IP']))
3021          {
3022              $ip = $_SERVER['HTTP_CLIENT_IP'];
3023          }
3024      }
3025  
3026      if($plugins)
3027      {
3028          $ip_array = array("ip" => &$ip); // Used for backwards compatibility on this hook with the updated run_hooks() function.
3029          $plugins->run_hooks("get_ip", $ip_array);
3030      }
3031  
3032      return $ip;
3033  }
3034  
3035  /**
3036   * Fetch the friendly size (GB, MB, KB, B) for a specified file size.
3037   *
3038   * @param int The size in bytes
3039   * @return string The friendly file size
3040   */
3041  function get_friendly_size($size)
3042  {
3043      global $lang;
3044  
3045      if(!is_numeric($size))
3046      {
3047          return $lang->na;
3048      }
3049  
3050      // Yottabyte (1024 Zettabytes)
3051      if($size >= 1208925819614629174706176)
3052      {
3053          $size = my_number_format(round(($size / 1208925819614629174706176), 2))." ".$lang->size_yb;
3054      }
3055      // Zetabyte (1024 Exabytes)
3056      elseif($size >= 1180591620717411303424)
3057      {
3058          $size = my_number_format(round(($size / 1180591620717411303424), 2))." ".$lang->size_zb;
3059      }
3060      // Exabyte (1024 Petabytes)
3061      elseif($size >= 1152921504606846976)
3062      {
3063          $size = my_number_format(round(($size / 1152921504606846976), 2))." ".$lang->size_eb;
3064      }
3065      // Petabyte (1024 Terabytes)
3066      elseif($size >= 1125899906842624)
3067      {
3068          $size = my_number_format(round(($size / 1125899906842624), 2))." ".$lang->size_pb;
3069      }
3070      // Terabyte (1024 Gigabytes)
3071      elseif($size >= 1099511627776)
3072      {
3073          $size = my_number_format(round(($size / 1099511627776), 2))." ".$lang->size_tb;
3074      }
3075      // Gigabyte (1024 Megabytes)
3076      elseif($size >= 1073741824)
3077      {
3078          $size = my_number_format(round(($size / 1073741824), 2))." ".$lang->size_gb;
3079      }
3080      // Megabyte (1024 Kilobytes)
3081      elseif($size >= 1048576)
3082      {
3083          $size = my_number_format(round(($size / 1048576), 2))." ".$lang->size_mb;
3084      }
3085      // Kilobyte (1024 bytes)
3086      elseif($size >= 1024)
3087      {
3088          $size = my_number_format(round(($size / 1024), 2))." ".$lang->size_kb;
3089      }
3090      elseif($size == 0)
3091      {
3092          $size = "0 ".$lang->size_bytes;
3093      }
3094      else
3095      {
3096          $size = my_number_format($size)." ".$lang->size_bytes;
3097      }
3098  
3099      return $size;
3100  }
3101  
3102  /**
3103   * Get the attachment icon for a specific file extension
3104   *
3105   * @param string The file extension
3106   * @return string The attachment icon
3107   */
3108  function get_attachment_icon($ext)
3109  {
3110      global $cache, $attachtypes, $theme;
3111  
3112      if(!$attachtypes)
3113      {
3114          $attachtypes = $cache->read("attachtypes");
3115      }
3116  
3117      $ext = my_strtolower($ext);
3118  
3119      if($attachtypes[$ext]['icon'])
3120      {
3121          if(defined("IN_ADMINCP"))
3122          {
3123              $icon = str_replace("{theme}", "", $attachtypes[$ext]['icon']);
3124              if(my_substr($icon, 0, 1) != "/" && my_substr($icon, 0, 7) != "http://")
3125              {
3126                  $icon = "../".$icon;
3127              }
3128          }
3129          elseif(defined("IN_PORTAL"))
3130          {
3131              global $change_dir;
3132              $icon = $change_dir."/".str_replace("{theme}", $theme['imgdir'], $attachtypes[$ext]['icon']);
3133          }
3134          else
3135          {
3136              $icon = str_replace("{theme}", $theme['imgdir'], $attachtypes[$ext]['icon']);
3137          }
3138          return "<img src=\"{$icon}\" border=\"0\" alt=\".{$ext}\" />";
3139      }
3140      else
3141      {
3142          if(defined("IN_ADMINCP"))
3143          {
3144              $theme['imgdir'] = "../images";
3145          }
3146          else if(defined("IN_PORTAL"))
3147          {
3148              global $change_dir;
3149              $theme['imgdir'] = "{$change_dir}/images";
3150          }
3151  
3152          return "<img src=\"{$theme['imgdir']}/attachtypes/unknown.gif\" border=\"0\" alt=\".{$ext}\" />";
3153      }
3154  }
3155  
3156  /**
3157   * Get a list of the unviewable forums for the current user
3158   *
3159   * @param boolean Set to true to only fetch those forums for which users can actually read a thread in.
3160   * @return string Comma separated values list of the forum IDs which the user cannot view
3161   */
3162  function get_unviewable_forums($only_readable_threads=false)
3163  {
3164      global $forum_cache, $permissioncache, $mybb, $unviewable, $templates, $forumpass;
3165  
3166      if(!is_array($forum_cache))
3167      {
3168          cache_forums();
3169      }
3170  
3171      if(!is_array($permissioncache))
3172      {
3173          $permissioncache = forum_permissions();
3174      }
3175  
3176      $password_forums = array();
3177      foreach($forum_cache as $fid => $forum)
3178      {
3179          if($permissioncache[$forum['fid']])
3180          {
3181              $perms = $permissioncache[$forum['fid']];
3182          }
3183          else
3184          {
3185              $perms = $mybb->usergroup;
3186          }
3187  
3188          $pwverified = 1;
3189  
3190          if($forum['password'] != "")
3191          {
3192              if($mybb->cookies['forumpass'][$forum['fid']] != md5($mybb->user['uid'].$forum['password']))
3193              {
3194                  $pwverified = 0;
3195              }
3196  
3197              $password_forums[$forum['fid']] = $forum['password'];
3198          }
3199          else
3200          {
3201              // Check parents for passwords
3202              $parents = explode(",", $forum['parentlist']);
3203              foreach($parents as $parent)
3204              {
3205                  if(isset($password_forums[$parent]) && $mybb->cookies['forumpass'][$parent] != md5($mybb->user['uid'].$password_forums[$parent]))
3206                  {
3207                      $pwverified = 0;
3208                  }
3209              }
3210          }
3211  
3212          if($perms['canview'] == 0 || $pwverified == 0 || ($only_readable_threads == true && $perms['canviewthreads'] == 0))
3213          {
3214              if($unviewableforums)
3215              {
3216                  $unviewableforums .= ",";
3217              }
3218  
3219              $unviewableforums .= "'".$forum['fid']."'";
3220          }
3221      }
3222  
3223      if(isset($unviewableforums))
3224      {
3225          return $unviewableforums;
3226      }
3227  }
3228  
3229  /**
3230   * Fixes mktime for dates earlier than 1970
3231   *
3232   * @param string The date format to use
3233   * @param int The year of the date
3234   * @return string The correct date format
3235   */
3236  function fix_mktime($format, $year)
3237  {
3238      // Our little work around for the date < 1970 thing.
3239      // -2 idea provided by Matt Light (http://www.mephex.com)
3240      $format = str_replace("Y", $year, $format);
3241      $format = str_replace("y", my_substr($year, -2), $format);
3242  
3243      return $format;
3244  }
3245  
3246  /**
3247   * Build the breadcrumb navigation trail from the specified items
3248   *
3249   * @return The formatted breadcrumb navigation trail
3250   */
3251  function build_breadcrumb()
3252  {
3253      global $nav, $navbits, $templates, $theme, $lang, $mybb;
3254  
3255      eval("\$navsep = \"".$templates->get("nav_sep")."\";");
3256  
3257      $i = 0;
3258      $activesep = '';
3259  
3260      if(is_array($navbits))
3261      {
3262          reset($navbits);
3263          foreach($navbits as $key => $navbit)
3264          {
3265              if(isset($navbits[$key+1]))
3266              {
3267                  if(isset($navbits[$key+2]))
3268                  {
3269                      $sep = $navsep;
3270                  }
3271                  else
3272                  {
3273                      $sep = "";
3274                  }
3275  
3276                  $multipage = null;
3277                  $multipage_dropdown = null;
3278                  if(!empty($navbit['multipage']))
3279                  {
3280                      $multipage = multipage($navbit['multipage']['num_threads'], $mybb->settings['threadsperpage'], $navbit['multipage']['current_page'], $navbit['multipage']['url'], true);
3281                      if($multipage)
3282                      {
3283                          ++$i;
3284                          $multipage_dropdown = " <img src=\"{$theme['imgdir']}/arrow_down.gif\" alt=\"v\" title=\"\" class=\"pagination_breadcrumb_link\" id=\"breadcrumb_multipage\" />{$multipage}";
3285                          $sep = $multipage_dropdown.$sep;
3286                      }
3287                  }
3288  
3289                  // Replace page 1 URLs
3290                  $navbit['url'] = str_replace("-page-1.html", ".html", $navbit['url']);
3291                  $navbit['url'] = preg_replace("/&amp;page=1$/", "", $navbit['url']);
3292  
3293                  eval("\$nav .= \"".$templates->get("nav_bit")."\";");
3294              }
3295          }
3296      }
3297  
3298      $navsize = count($navbits);
3299      $navbit = $navbits[$navsize-1];
3300  
3301      if($nav)
3302      {
3303          eval("\$activesep = \"".$templates->get("nav_sep_active")."\";");
3304      }
3305  
3306      eval("\$activebit = \"".$templates->get("nav_bit_active")."\";");
3307      eval("\$donenav = \"".$templates->get("nav")."\";");
3308  
3309      return $donenav;
3310  }
3311  
3312  /**
3313   * Add a breadcrumb menu item to the list.
3314   *
3315   * @param string The name of the item to add
3316   * @param string The URL of the item to add
3317   */
3318  function add_breadcrumb($name, $url="")
3319  {
3320      global $navbits;
3321  
3322      $navsize = count($navbits);
3323      $navbits[$navsize]['name'] = $name;
3324      $navbits[$navsize]['url'] = $url;
3325  }
3326  
3327  /**
3328   * Build the forum breadcrumb nagiation (the navigation to a specific forum including all parent forums)
3329   *
3330   * @param int The forum ID to build the navigation for
3331   * @param array The multipage drop down array of information
3332   */
3333  function build_forum_breadcrumb($fid, $multipage=array())
3334  {
3335      global $pforumcache, $currentitem, $forum_cache, $navbits, $lang, $base_url, $archiveurl;
3336  
3337      if(!$pforumcache)
3338      {
3339          if(!is_array($forum_cache))
3340          {
3341              cache_forums();
3342          }
3343  
3344          foreach($forum_cache as $key => $val)
3345          {
3346              $pforumcache[$val['fid']][$val['pid']] = $val;
3347          }
3348      }
3349  
3350      if(is_array($pforumcache[$fid]))
3351      {
3352          foreach($pforumcache[$fid] as $key => $forumnav)
3353          {
3354              if($fid == $forumnav['fid'])
3355              {
3356                  if(!empty($pforumcache[$forumnav['pid']]))
3357                  {
3358                      build_forum_breadcrumb($forumnav['pid']);
3359                  }
3360  
3361                  $navsize = count($navbits);
3362                  // Convert & to &amp;
3363                  $navbits[$navsize]['name'] = preg_replace("#&(?!\#[0-9]+;)#si", "&amp;", $forumnav['name']);
3364  
3365                  if(defined("IN_ARCHIVE"))
3366                  {
3367                      // Set up link to forum in breadcrumb.
3368                      if($pforumcache[$fid][$forumnav['pid']]['type'] == 'f' || $pforumcache[$fid][$forumnav['pid']]['type'] == 'c')
3369                      {
3370                          $navbits[$navsize]['url'] = "{$base_url}forum-".$forumnav['fid'].".html";
3371                      }
3372                      else
3373                      {
3374                          $navbits[$navsize]['url'] = $archiveurl."/index.php";
3375                      }
3376                  }
3377                  elseif(!empty($multipage))
3378                  {
3379                      $navbits[$navsize]['url'] = get_forum_link($forumnav['fid'], $multipage['current_page']);
3380  
3381                      $navbits[$navsize]['multipage'] = $multipage;
3382                      $navbits[$navsize]['multipage']['url'] = str_replace('{fid}', $forumnav['fid'], FORUM_URL_PAGED);
3383                  }
3384                  else
3385                  {
3386                      $navbits[$navsize]['url'] = get_forum_link($forumnav['fid']);
3387                  }
3388              }
3389          }
3390      }
3391  
3392      return 1;
3393  }
3394  
3395  /**
3396   * Resets the breadcrumb navigation to the first item, and clears the rest
3397   */
3398  function reset_breadcrumb()
3399  {
3400      global $navbits;
3401  
3402      $newnav[0]['name'] = $navbits[0]['name'];
3403      $newnav[0]['url'] = $navbits[0]['url'];
3404      $newnav[0]['options'] = $navbits[0]['options'];
3405  
3406      unset($GLOBALS['navbits']);
3407      $GLOBALS['navbits'] = $newnav;
3408  }
3409  
3410  /**
3411   * Builds a URL to an archive mode page
3412   *
3413   * @param string The type of page (thread|announcement|forum)
3414   * @param int The ID of the item
3415   * @return string The URL
3416   */
3417  function build_archive_link($type, $id="")
3418  {
3419      global $mybb;
3420  
3421      // If the server OS is not Windows and not Apache or the PHP is running as a CGI or we have defined ARCHIVE_QUERY_STRINGS, use query strings - DIRECTORY_SEPARATOR checks if running windows
3422      //if((DIRECTORY_SEPARATOR == '\\' && is_numeric(stripos($_SERVER['SERVER_SOFTWARE'], "apache")) == false) || is_numeric(stripos(SAPI_NAME, "cgi")) !== false || defined("ARCHIVE_QUERY_STRINGS"))
3423      if($mybb->settings['seourls_archive'] == 1)
3424      {
3425          $base_url = $mybb->settings['bburl']."/archive/index.php/";
3426      }
3427      else
3428      {
3429          $base_url = $mybb->settings['bburl']."/archive/index.php?";
3430      }
3431  
3432      switch($type)
3433      {
3434          case "thread":
3435              $url = "{$base_url}thread-{$id}.html";
3436              break;
3437          case "announcement":
3438              $url = "{$base_url}announcement-{$id}.html";
3439              break;
3440          case "forum":
3441              $url = "{$base_url}forum-{$id}.html";
3442              break;
3443          default:
3444              $url = $mybb->settings['bburl']."/archive/index.php";
3445      }
3446  
3447      return $url;
3448  }
3449  
3450  /**
3451   * Prints a debug information page
3452   */
3453  function debug_page()
3454  {
3455      global $db, $debug, $templates, $templatelist, $mybb, $maintimer, $globaltime, $ptimer, $parsetime, $lang;
3456  
3457      $totaltime = $maintimer->totaltime;
3458      $phptime = $maintimer->format($maintimer->totaltime - $db->query_time);
3459      $query_time = $maintimer->format($db->query_time);
3460  
3461      $percentphp = number_format((($phptime/$maintimer->totaltime)*100), 2);
3462      $percentsql = number_format((($query_time/$maintimer->totaltime)*100), 2);
3463  
3464      $phpversion = PHP_VERSION;
3465  
3466      $serverload = get_server_load();
3467  
3468      if($mybb->settings['gzipoutput'] != 0)
3469      {
3470          $gzipen = "Enabled";
3471      }
3472      else
3473      {
3474          $gzipen = "Disabled";
3475      }
3476  
3477      echo "<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Transitional//EN\" \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\">\n";
3478      echo "<html xmlns=\"http://www.w3.org/1999/xhtml\" xml:lang=\"en\" lang=\"en\">";
3479      echo "<head>";
3480      echo "<title>MyBB Debug Information</title>";
3481      echo "</head>";
3482      echo "<body>";
3483      echo "<h1>MyBB Debug Information</h1>\n";
3484      echo "<h2>Page Generation</h2>\n";
3485      echo "<table bgcolor=\"#666666\" width=\"95%\" cellpadding=\"4\" cellspacing=\"1\" align=\"center\">\n";
3486      echo "<tr>\n";
3487      echo "<td bgcolor=\"#CCCCCC\" colspan=\"4\"><b><span style=\"size:2;\">Page Generation Statistics</span></b></td>\n";
3488      echo "</tr>\n";
3489      echo "<tr>\n";
3490      echo "<td bgcolor=\"#EFEFEF\" width=\"25%\"><b><font face=\"Tahoma\" size=\"2\">Page Generation Time:</font></b></td>\n";
3491      echo "<td bgcolor=\"#FEFEFE\" width=\"25%\"><font face=\"Tahoma\" size=\"2\">$totaltime seconds</font></td>\n";
3492      echo "<td bgcolor=\"#EFEFEF\" width=\"25%\"><b><font face=\"Tahoma\" size=\"2\">No. DB Queries:</font></b></td>\n";
3493      echo "<td bgcolor=\"#FEFEFE\" width=\"25%\"><font face=\"Tahoma\" size=\"2\">$db->query_count</font></td>\n";
3494      echo "</tr>\n";
3495      echo "<tr>\n";
3496      echo "<td bgcolor=\"#EFEFEF\" width=\"25%\"><b><font face=\"Tahoma\" size=\"2\">PHP Processing Time:</font></b></td>\n";
3497      echo "<td bgcolor=\"#FEFEFE\" width=\"25%\"><font face=\"Tahoma\" size=\"2\">$phptime seconds ($percentphp%)</font></td>\n";
3498      echo "<td bgcolor=\"#EFEFEF\" width=\"25%\"><b><font face=\"Tahoma\" size=\"2\">DB Processing Time:</font></b></td>\n";
3499      echo "<td bgcolor=\"#FEFEFE\" width=\"25%\"><font face=\"Tahoma\" size=\"2\">$query_time seconds ($percentsql%)</font></td>\n";
3500      echo "</tr>\n";
3501      echo "<tr>\n";
3502      echo "<td bgcolor=\"#EFEFEF\" width=\"25%\"><b><font face=\"Tahoma\" size=\"2\">Extensions Used:</font></b></td>\n";
3503      echo "<td bgcolor=\"#FEFEFE\" width=\"25%\"><font face=\"Tahoma\" size=\"2\">{$mybb->config['database']['type']}, xml</font></td>\n";
3504      echo "<td bgcolor=\"#EFEFEF\" width=\"25%\"><b><font face=\"Tahoma\" size=\"2\">Global.php Processing Time:</font></b></td>\n";
3505      echo "<td bgcolor=\"#FEFEFE\" width=\"25%\"><font face=\"Tahoma\" size=\"2\">$globaltime seconds</font></td>\n";
3506      echo "</tr>\n";
3507      echo "<tr>\n";
3508      echo "<td bgcolor=\"#EFEFEF\" width=\"25%\"><b><font face=\"Tahoma\" size=\"2\">PHP Version:</font></b></td>\n";
3509      echo "<td bgcolor=\"#FEFEFE\" width=\"25%\"><font face=\"Tahoma\" size=\"2\">$phpversion</font></td>\n";
3510      echo "<td bgcolor=\"#EFEFEF\" width=\"25%\"><b><font face=\"Tahoma\" size=\"2\">Server Load:</font></b></td>\n";
3511      echo "<td bgcolor=\"#FEFEFE\" width=\"25%\"><font face=\"Tahoma\" size=\"2\">$serverload</font></td>\n";
3512      echo "</tr>\n";
3513      echo "<tr>\n";
3514      echo "<td bgcolor=\"#EFEFEF\" width=\"25%\"><b><font face=\"Tahoma\" size=\"2\">GZip Encoding Status:</font></b></td>\n";
3515      echo "<td bgcolor=\"#FEFEFE\" width=\"25%\"><font face=\"Tahoma\" size=\"2\">$gzipen</font></td>\n";
3516      echo "<td bgcolor=\"#EFEFEF\" width=\"25%\"><b><font face=\"Tahoma\" size=\"2\">No. Templates Used:</font></b></td>\n";
3517      echo "<td bgcolor=\"#FEFEFE\" width=\"25%\"><font face=\"Tahoma\" size=\"2\">".count($templates->cache)." (".intval(count(explode(",", $templatelist)))." Cached / ".intval(count($templates->uncached_templates))." Manually Loaded)</font></td>\n";
3518      echo "</tr>\n";
3519  
3520      $memory_usage = get_memory_usage();
3521      if(!$memory_usage)
3522      {
3523          $memory_usage = $lang->unknown;
3524      }
3525      else
3526      {
3527          $memory_usage = get_friendly_size($memory_usage)." ({$memory_usage} bytes)";
3528      }
3529      $memory_limit = @ini_get("memory_limit");
3530      echo "<tr>\n";
3531      echo "<td bgcolor=\"#EFEFEF\" width=\"25%\"><b><font face=\"Tahoma\" size=\"2\">Memory Usage:</font></b></td>\n";
3532      echo "<td bgcolor=\"#FEFEFE\" width=\"25%\"><font face=\"Tahoma\" size=\"2\">{$memory_usage}</font></td>\n";
3533      echo "<td bgcolor=\"#EFEFEF\" width=\"25%\"><b><font face=\"Tahoma\" size=\"2\">Memory Limit:</font></b></td>\n";
3534      echo "<td bgcolor=\"#FEFEFE\" width=\"25%\"><font face=\"Tahoma\" size=\"2\">{$memory_limit}</font></td>\n";
3535      echo "</tr>\n";
3536  
3537      echo "</table>\n";
3538  
3539      echo "<h2>Database Connections (".count($db->connections)." Total) </h2>\n";
3540      echo "<table style=\"background-color: #666;\" width=\"95%\" cellpadding=\"4\" cellspacing=\"1\" align=\"center\">\n";
3541      echo "<tr>\n";
3542      echo "<td style=\"background: #fff;\">".implode("<br />", $db->connections)."</td>\n";
3543      echo "</tr>\n";
3544      echo "</table>\n";
3545      echo "<br />\n";
3546  
3547      echo "<h2>Database Queries (".$db->query_count." Total) </h2>\n";
3548      echo $db->explain;
3549      echo "<h2>Template Statistics</h2>\n";
3550  
3551      if(count($templates->cache) > 0)
3552      {
3553          echo "<table style=\"background-color: #666;\" width=\"95%\" cellpadding=\"4\" cellspacing=\"1\" align=\"center\">\n";
3554          echo "<tr>\n";
3555          echo "<td style=\"background-color: #ccc;\"><strong>Templates Used (Loaded for this Page) - ".count($templates->cache)." Total</strong></td>\n";
3556          echo "</tr>\n";
3557          echo "<tr>\n";
3558          echo "<td style=\"background: #fff;\">".implode(", ", array_keys($templates->cache))."</td>\n";
3559          echo "</tr>\n";
3560          echo "</table>\n";
3561          echo "<br />\n";
3562      }
3563  
3564      if(count($templates->uncached_templates) > 0)
3565      {
3566          echo "<table style=\"background-color: #666;\" width=\"95%\" cellpadding=\"4\" cellspacing=\"1\" align=\"center\">\n";
3567          echo "<tr>\n";
3568          echo "<td style=\"background-color: #ccc;\"><strong>Templates Requiring Additional Calls (Not Cached at Startup) - ".count($templates->uncached_templates)." Total</strong></td>\n";
3569          echo "</tr>\n";
3570          echo "<tr>\n";
3571          echo "<td style=\"background: #fff;\">".implode(", ", $templates->uncached_templates)."</td>\n";
3572          echo "</tr>\n";
3573          echo "</table>\n";
3574          echo "<br />\n";
3575      }
3576      echo "</body>";
3577      echo "</html>";
3578      exit;
3579  }
3580  
3581  /**
3582   * Outputs the correct page headers.
3583   */
3584  function send_page_headers()
3585  {
3586      global $mybb;
3587  
3588      if($mybb->settings['nocacheheaders'] == 1)
3589      {
3590          header("Expires: Sat, 1 Jan 2000 01:00:00 GMT");
3591          header("Last-Modified: ".gmdate("D, d M Y H:i:s")." GMT");
3592          header("Cache-Control: no-cache, must-revalidate");
3593          header("Pragma: no-cache");
3594      }
3595  }
3596  
3597  /**
3598   * Mark specific reported posts of a certain type as dealt with
3599   *
3600   * @param mixed An array or int of the ID numbers you're marking as dealt with
3601   * @param string The type of item the above IDs are for - post, posts, thread, threads, forum, all
3602   */
3603  function mark_reports($id, $type="post")
3604  {
3605      global $db, $cache, $plugins;
3606  
3607      switch($type)
3608      {
3609          case "posts":
3610              if(is_array($id))
3611              {
3612                  $rids = implode($id, "','");
3613                  $rids = "'0','$rids'";
3614                  $db->update_query("reportedposts", array('reportstatus' => 1), "pid IN($rids) AND reportstatus='0'");
3615              }
3616              break;
3617          case "post":
3618              $db->update_query("reportedposts", array('reportstatus' => 1), "pid='$id' AND reportstatus='0'");
3619              break;
3620          case "threads":
3621              if(is_array($id))
3622              {
3623                  $rids = implode($id, "','");
3624                  $rids = "'0','$rids'";
3625                  $db->update_query("reportedposts", array('reportstatus' => 1), "tid IN($rids) AND reportstatus='0'");
3626              }
3627              break;
3628          case "thread":
3629              $db->update_query("reportedposts", array('reportstatus' => 1), "tid='$id' AND reportstatus='0'");
3630              break;
3631          case "forum":
3632              $db->update_query("reportedposts", array('reportstatus' => 1), "fid='$id' AND reportstatus='0'");
3633              break;
3634          case "all":
3635              $db->update_query("reportedposts", array('reportstatus' => 1), "reportstatus='0'");
3636              break;
3637      }
3638  
3639      $arguments = array('id' => $id, 'type' => $type);
3640      $plugins->run_hooks("mark_reports", $arguments);
3641      $cache->update_reportedposts();
3642  }
3643  
3644  /**
3645   * Fetch a friendly x days, y months etc date stamp from a timestamp
3646   *
3647   * @param int The timestamp
3648   * @param array Array of options
3649   * @return string The friendly formatted timestamp
3650   */
3651  function nice_time($stamp, $options=array())
3652  {
3653      global $lang;
3654  
3655      $ysecs = 365*24*60*60;
3656      $mosecs = 31*24*60*60;
3657      $wsecs = 7*24*60*60;
3658      $dsecs = 24*60*60;
3659      $hsecs = 60*60;
3660      $msecs = 60;
3661  
3662      if(isset($options['short']))
3663      {
3664          $lang_year = $lang->year_short;
3665          $lang_years = $lang->years_short;
3666          $lang_month = $lang->month_short;
3667          $lang_months = $lang->months_short;
3668          $lang_week = $lang->week_short;
3669          $lang_weeks = $lang->weeks_short;
3670          $lang_day = $lang->day_short;
3671          $lang_days = $lang->days_short;
3672          $lang_hour = $lang->hour_short;
3673          $lang_hours = $lang->hours_short;
3674          $lang_minute = $lang->minute_short;
3675          $lang_minutes = $lang->minutes_short;
3676          $lang_second = $lang->second_short;
3677          $lang_seconds = $lang->seconds_short;
3678      }
3679      else
3680      {
3681          $lang_year = " ".$lang->year;
3682          $lang_years = " ".$lang->years;
3683          $lang_month = " ".$lang->month;
3684          $lang_months = " ".$lang->months;
3685          $lang_week = " ".$lang->week;
3686          $lang_weeks = " ".$lang->weeks;
3687          $lang_day = " ".$lang->day;
3688          $lang_days = " ".$lang->days;
3689          $lang_hour = " ".$lang->hour;
3690          $lang_hours = " ".$lang->hours;
3691          $lang_minute = " ".$lang->minute;
3692          $lang_minutes = " ".$lang->minutes;
3693          $lang_second = " ".$lang->second;
3694          $lang_seconds = " ".$lang->seconds;
3695      }
3696  
3697      $years = floor($stamp/$ysecs);
3698      $stamp %= $ysecs;
3699      $months = floor($stamp/$mosecs);
3700      $stamp %= $mosecs;
3701      $weeks = floor($stamp/$wsecs);
3702      $stamp %= $wsecs;
3703      $days = floor($stamp/$dsecs);
3704      $stamp %= $dsecs;
3705      $hours = floor($stamp/$hsecs);
3706      $stamp %= $hsecs;
3707      $minutes = floor($stamp/$msecs);
3708      $stamp %= $msecs;
3709      $seconds = $stamp;
3710  
3711      if($years == 1)
3712      {
3713          $nicetime['years'] = "1".$lang_year;
3714      }
3715      else if($years > 1)
3716      {
3717          $nicetime['years'] = $years.$lang_years;
3718      }
3719  
3720      if($months == 1)
3721      {
3722          $nicetime['months'] = "1".$lang_month;
3723      }
3724      else if($months > 1)
3725      {
3726          $nicetime['months'] = $months.$lang_months;
3727      }
3728  
3729      if($weeks == 1)
3730      {
3731          $nicetime['weeks'] = "1".$lang_week;
3732      }
3733      else if($weeks > 1)
3734      {
3735          $nicetime['weeks'] = $weeks.$lang_weeks;
3736      }
3737  
3738      if($days == 1)
3739      {
3740          $nicetime['days'] = "1".$lang_day;
3741      }
3742      else if($days > 1)
3743      {
3744          $nicetime['days'] = $days.$lang_days;
3745      }
3746  
3747      if(!isset($options['hours']) || $options['hours'] !== false)
3748      {
3749          if($hours == 1)
3750          {
3751              $nicetime['hours'] = "1".$lang_hour;
3752          }
3753          else if($hours > 1)
3754          {
3755              $nicetime['hours'] = $hours.$lang_hours;
3756          }
3757      }
3758  
3759      if(!isset($options['minutes']) || $options['minutes'] !== false)
3760      {
3761          if($minutes == 1)
3762          {
3763              $nicetime['minutes'] = "1".$lang_minute;
3764          }
3765          else if($minutes > 1)
3766          {
3767              $nicetime['minutes'] = $minutes.$lang_minutes;
3768          }
3769      }
3770  
3771      if(!isset($options['seconds']) || $options['seconds'] !== false)
3772      {
3773          if($seconds == 1)
3774          {
3775              $nicetime['seconds'] = "1".$lang_second;
3776          }
3777          else if($seconds > 1)
3778          {
3779              $nicetime['seconds'] = $seconds.$lang_seconds;
3780          }
3781      }
3782  
3783      if(is_array($nicetime))
3784      {
3785          return implode(", ", $nicetime);
3786      }
3787  }
3788  
3789  /**
3790   * Select an alternating row colour based on the previous call to this function
3791   *
3792   * @param int 1 to reset the row to trow1.
3793   * @return string trow1 or trow2 depending on the previous call
3794   */
3795  function alt_trow($reset=0)
3796  {
3797      global $alttrow;
3798  
3799      if($alttrow == "trow1" && !$reset)
3800      {
3801          $trow = "trow2";
3802      }
3803      else
3804      {
3805          $trow = "trow1";
3806      }
3807  
3808      $alttrow = $trow;
3809  
3810      return $trow;
3811  }
3812  
3813  /**
3814   * Add a user to a specific additional user group.
3815   *
3816   * @param int The user ID
3817   * @param int The user group ID to join
3818   */
3819  function join_usergroup($uid, $joingroup)
3820  {
3821      global $db, $mybb;
3822  
3823      if($uid == $mybb->user['uid'])
3824      {
3825          $user = $mybb->user;
3826      }
3827      else
3828      {
3829          $query = $db->simple_select("users", "additionalgroups, usergroup", "uid='".intval($uid)."'");
3830          $user = $db->fetch_array($query);
3831      }
3832  
3833      // Build the new list of additional groups for this user and make sure they're in the right format
3834      $usergroups = "";
3835      $usergroups = $user['additionalgroups'].",".$joingroup;
3836      $groupslist = "";
3837      $groups = explode(",", $usergroups);
3838  
3839      if(is_array($groups))
3840      {
3841          foreach($groups as $gid)
3842          {
3843              if(trim($gid) != "" && $gid != $user['usergroup'] && !$donegroup[$gid])
3844              {
3845                  $groupslist .= $comma.$gid;
3846                  $comma = ",";
3847                  $donegroup[$gid] = 1;
3848              }
3849          }
3850      }
3851  
3852      // What's the point in updating if they're the same?
3853      if($groupslist != $user['additionalgroups'])
3854      {
3855          $db->update_query("users", array('additionalgroups' => $groupslist), "uid='".intval($uid)."'");
3856          return true;
3857      }
3858      else
3859      {
3860          return false;
3861      }
3862  }
3863  
3864  /**
3865   * Remove a user from a specific additional user group
3866   *
3867   * @param int The user ID
3868   * @param int The user group ID
3869   */
3870  function leave_usergroup($uid, $leavegroup)
3871  {
3872      global $db, $mybb, $cache;
3873  
3874      if($uid == $mybb->user['uid'])
3875      {
3876          $user = $mybb->user;
3877      }
3878      else
3879      {
3880          $query = $db->simple_select("users", "*", "uid='".intval($uid)."'");
3881          $user = $db->fetch_array($query);
3882      }
3883  
3884      $groupslist = "";
3885      $usergroups = "";
3886      $usergroups = $user['additionalgroups'].",";
3887  
3888      $groups = explode(",", $user['additionalgroups']);
3889  
3890      if(is_array($groups))
3891      {
3892          foreach($groups as $gid)
3893          {
3894              if(trim($gid) != "" && $leavegroup != $gid && !$donegroup[$gid])
3895              {
3896                  $groupslist .= $comma.$gid;
3897                  $comma = ",";
3898                  $donegroup[$gid] = 1;
3899              }
3900          }
3901      }
3902  
3903      $dispupdate = "";
3904      if($leavegroup == $user['displaygroup'])
3905      {
3906          $dispupdate = ", displaygroup=usergroup";
3907      }
3908  
3909      $db->write_query("
3910          UPDATE ".TABLE_PREFIX."users
3911          SET additionalgroups='$groupslist' $dispupdate
3912          WHERE uid='".intval($uid)."'
3913      ");
3914  
3915      $cache->update_moderators();
3916  }
3917  
3918  /**
3919   * Get the current location taking in to account different web serves and systems
3920   *
3921   * @param boolean True to return as "hidden" fields
3922   * @param array Array of fields to ignore if first argument is true
3923   * @return string The current URL being accessed
3924   */
3925  function get_current_location($fields=false, $ignore=array())
3926  {
3927      if(defined("MYBB_LOCATION"))
3928      {
3929          return MYBB_LOCATION;
3930      }
3931  
3932      if(!empty($_SERVER['PATH_INFO']))
3933      {
3934          $location = htmlspecialchars_uni($_SERVER['PATH_INFO']);
3935      }
3936      elseif(!empty($_ENV['PATH_INFO']))
3937      {
3938          $location = htmlspecialchars_uni($_ENV['PATH_INFO']);
3939      }
3940      elseif(!empty($_ENV['PHP_SELF']))
3941      {
3942          $location = htmlspecialchars_uni($_ENV['PHP_SELF']);
3943      }
3944      else
3945      {
3946          $location = htmlspecialchars_uni($_SERVER['PHP_SELF']);
3947      }
3948  
3949      if($fields == true)
3950      {
3951          global $mybb;
3952  
3953          if(!is_array($ignore))
3954          {
3955              $ignore = array($ignore);
3956          }
3957  
3958          $form_html = "";
3959          if(!empty($mybb->input))
3960          {
3961              foreach($mybb->input as $name => $value)
3962              {
3963                  if(in_array($name, $ignore))
3964                  {
3965                      continue;
3966                  }
3967  
3968                  $form_html .= "<input type=\"hidden\" name=\"".htmlspecialchars_uni((string)$name)."\" value=\"".htmlspecialchars_uni((string)$value)."\" />\n";
3969              }
3970          }
3971  
3972          return array('location' => $location, 'form_html' => $form_html, 'form_method' => $mybb->request_method);
3973      }
3974      else
3975      {
3976          if(isset($_SERVER['QUERY_STRING']))
3977          {
3978              $location .= "?".htmlspecialchars_uni($_SERVER['QUERY_STRING']);
3979          }
3980          else if(isset($_ENV['QUERY_STRING']))
3981          {
3982              $location .= "?".htmlspecialchars_uni($_ENV['QUERY_STRING']);
3983          }
3984  
3985          if((isset($_SERVER['REQUEST_METHOD']) && $_SERVER['REQUEST_METHOD'] == "POST") || (isset($_ENV['REQUEST_METHOD']) && $_ENV['REQUEST_METHOD'] == "POST"))
3986          {
3987              $post_array = array('action', 'fid', 'pid', 'tid', 'uid', 'eid');
3988  
3989              foreach($post_array as $var)
3990              {
3991                  if(isset($_POST[$var]))
3992                  {
3993                      $addloc[] = urlencode($var).'='.urlencode($_POST[$var]);
3994                  }
3995              }
3996  
3997              if(isset($addloc) && is_array($addloc))
3998              {
3999                  if(strpos($location, "?") === false)
4000                  {
4001                      $location .= "?";
4002                  }
4003                  else
4004                  {
4005                      $location .= "&amp;";
4006                  }
4007                  $location .= implode("&amp;", $addloc);
4008              }
4009          }
4010  
4011          if(strlen($location) > 150)
4012          {
4013              $location = substr($location, 0, 150);
4014          }
4015  
4016          return $location;
4017      }
4018  }
4019  
4020  /**
4021   * Build a theme selection menu
4022   *
4023   * @param string The name of the menu
4024   * @param int The ID of the selected theme
4025   * @param int The ID of the parent theme to select from
4026   * @param int The current selection depth
4027   * @param boolean Whether or not to override usergroup permissions (true to override)
4028   * @return string The theme selection list
4029   */
4030  function build_theme_select($name, $selected="", $tid=0, $depth="", $usergroup_override=false)
4031  {
4032      global $db, $themeselect, $tcache, $lang, $mybb, $limit;
4033  
4034      if($tid == 0)
4035      {
4036          $themeselect = "<select name=\"$name\">";
4037          $themeselect .= "<option value=\"0\">".$lang->use_default."</option>\n";
4038          $themeselect .= "<option value=\"0\">-----------</option>\n";
4039          $tid = 1;
4040      }
4041  
4042      if(!is_array($tcache))
4043      {
4044          $query = $db->simple_select("themes", "name, pid, tid, allowedgroups", "pid != '0'", array('order_by' => 'pid, name'));
4045  
4046          while($theme = $db->fetch_array($query))
4047          {
4048              $tcache[$theme['pid']][$theme['tid']] = $theme;
4049          }
4050      }
4051  
4052      if(is_array($tcache[$tid]))
4053      {
4054          // Figure out what groups this user is in
4055          if($mybb->user['additionalgroups'])
4056          {
4057              $in_groups = explode(",", $mybb->user['additionalgroups']);
4058          }
4059          $in_groups[] = $mybb->user['usergroup'];
4060  
4061          foreach($tcache[$tid] as $theme)
4062          {
4063              $sel = "";
4064              // Make theme allowed groups into array
4065              $is_allowed = false;
4066              if($theme['allowedgroups'] != "all")
4067              {
4068                  $allowed_groups = explode(",", $theme['allowedgroups']);
4069                  // See if groups user is in is allowed
4070                  foreach($allowed_groups as $agid)
4071                  {
4072                      if(in_array($agid, $in_groups))
4073                      {
4074                          $is_allowed = true;
4075                          break;
4076                      }
4077                  }
4078              }
4079  
4080              // Show theme if allowed, or if override is on
4081              if($is_allowed || $theme['allowedgroups'] == "all" || $usergroup_override == true)
4082              {
4083                  if($theme['tid'] == $selected)
4084                  {
4085                      $sel = " selected=\"selected\"";
4086                  }
4087  
4088                  if($theme['pid'] != 0)
4089                  {
4090                      $themeselect .= "<option value=\"".$theme['tid']."\"$sel>".$depth.htmlspecialchars_uni($theme['name'])."</option>";
4091                      $depthit = $depth."--";
4092                  }
4093  
4094                  if(array_key_exists($theme['tid'], $tcache))
4095                  {
4096                      build_theme_select($name, $selected, $theme['tid'], $depthit, $usergroup_override);
4097                  }
4098              }
4099          }
4100      }
4101  
4102      if($tid == 1)
4103      {
4104          $themeselect .= "</select>";
4105      }
4106  
4107      return $themeselect;
4108  }
4109  
4110  /**
4111   * Custom function for htmlspecialchars which takes in to account unicode
4112   *
4113   * @param string The string to format
4114   * @return string The string with htmlspecialchars applied
4115   */
4116  function htmlspecialchars_uni($message)
4117  {
4118      $message = preg_replace("#&(?!\#[0-9]+;)#si", "&amp;", $message); // Fix & but allow unicode
4119      $message = str_replace("<", "&lt;", $message);
4120      $message = str_replace(">", "&gt;", $message);
4121      $message = str_replace("\"", "&quot;", $message);
4122      return $message;
4123  }
4124  
4125  /**
4126   * Custom function for formatting numbers.
4127   *
4128   * @param int The number to format.
4129   * @return int The formatted number.
4130   */
4131  function my_number_format($number)
4132  {
4133      global $mybb;
4134  
4135      if($number == "-")
4136      {
4137          return $number;
4138      }
4139  
4140      if(is_int($number))
4141      {
4142          return number_format($number, 0, $mybb->settings['decpoint'], $mybb->settings['thousandssep']);
4143      }
4144      else
4145      {
4146          $parts = explode('.', $number);
4147  
4148          if(isset($parts[1]))
4149          {
4150              $decimals = my_strlen($parts[1]);
4151          }
4152          else
4153          {
4154              $decimals = 0;
4155          }
4156  
4157          return number_format((double)$number, $decimals, $mybb->settings['decpoint'], $mybb->settings['thousandssep']);
4158      }
4159  }
4160  
4161  function convert_through_utf8($str, $to=true)
4162  {
4163      global $lang;
4164      static $charset;
4165      static $use_mb;
4166      static $use_iconv;
4167  
4168      if(!isset($charset))
4169      {
4170          $charset = my_strtolower($lang->settings['charset']);
4171      }
4172  
4173      if($charset == "utf-8")
4174      {
4175          return $str;
4176      }
4177  
4178      if(!isset($use_iconv))
4179      {
4180          $use_iconv = function_exists("iconv");
4181      }
4182  
4183      if(!isset($use_mb))
4184      {
4185          $use_mb = function_exists("mb_convert_encoding");
4186      }
4187  
4188      if($use_iconv || $use_mb)
4189      {
4190          if($to)
4191          {
4192              $from_charset = $lang->settings['charset'];
4193              $to_charset = "UTF-8";
4194          }
4195          else
4196          {
4197              $from_charset = "UTF-8";
4198              $to_charset = $lang->settings['charset'];
4199          }
4200          if($use_iconv)
4201          {
4202              return iconv($from_charset, $to_charset."//IGNORE", $str);
4203          }
4204          else
4205          {
4206              return @mb_convert_encoding($str, $to_charset, $from_charset);
4207          }
4208      }
4209      elseif($charset == "iso-8859-1" && function_exists("utf8_encode"))
4210      {
4211          if($to)
4212          {
4213              return utf8_encode($str);
4214          }
4215          else
4216          {
4217              return utf8_decode($str);
4218          }
4219      }
4220      else
4221      {
4222          return $str;
4223      }
4224  }
4225  
4226  /**
4227   * Replacement function for PHP's wordwrap(). This version does not break up HTML tags, URLs or unicode references.
4228   *
4229   * @param string The string to be word wrapped
4230   * @return string The word wraped string
4231   */
4232  function my_wordwrap($message)
4233  {
4234      global $mybb;
4235  
4236      if($mybb->settings['wordwrap'] > 0)
4237      {
4238          $message = convert_through_utf8($message);
4239  
4240          if(!($new_message = @preg_replace("#(((?>[^\s&/<>\"\\-\[\]])|(&\#[a-z0-9]{1,10};)){{$mybb->settings['wordwrap']}})#u", "$0&#8203;", $message)))
4241          {
4242              $new_message = preg_replace("#(((?>[^\s&/<>\"\\-\[\]])|(&\#[a-z0-9]{1,10};)){{$mybb->settings['wordwrap']}})#", "$0&#8203;", $message);
4243          }
4244  
4245          $new_message = convert_through_utf8($new_message, false);
4246  
4247          return $new_message;
4248      }
4249  
4250      return $message;
4251  }
4252  
4253  /**
4254   * Workaround for date limitation in PHP to establish the day of a birthday (Provided by meme)
4255   *
4256   * @param int The month of the birthday
4257   * @param int The day of the birthday
4258   * @param int The year of the bithday
4259   * @return int The numeric day of the week for the birthday
4260   */
4261  function get_weekday($month, $day, $year)
4262  {
4263      $h = 4;
4264  
4265      for($i = 1969; $i >= $year; $i--)
4266      {
4267          $j = get_bdays($i);
4268  
4269          for($k = 11; $k >= 0; $k--)
4270          {
4271              $l = ($k + 1);
4272  
4273              for($m = $j[$k]; $m >= 1; $m--)
4274              {
4275                  $h--;
4276  
4277                  if($i == $year && $l == $month && $m == $day)
4278                  {
4279                      return $h;
4280                  }
4281  
4282                  if($h == 0)
4283                  {
4284                      $h = 7;
4285                  }
4286              }
4287          }
4288      }
4289  }
4290  
4291  /**
4292   * Workaround for date limitation in PHP to establish the day of a birthday (Provided by meme)
4293   *
4294   * @param int The year.
4295   * @return array The number of days in each month of that year
4296   */
4297  function get_bdays($in)
4298  {
4299      return array(
4300          31,
4301          ($in % 4 == 0 && ($in % 100 > 0 || $in % 400 == 0) ? 29 : 28),
4302          31,
4303          30,
4304          31,
4305          30,
4306          31,
4307          31,
4308          30,
4309          31,
4310          30,
4311          31
4312      );
4313  }
4314  
4315  /**
4316   * Formats a birthday appropriately
4317   *
4318   * @param string The PHP date format string
4319   * @param int The month of the birthday
4320   * @param int The day of the birthday
4321   * @param int The year of the birthday
4322   * @param int The weekday of the birthday
4323   * @return string The formatted birthday
4324   */
4325  function format_bdays($display, $bm, $bd, $by, $wd)
4326  {
4327      global $lang;
4328  
4329      $bdays = array(
4330          $lang->sunday,
4331          $lang->monday,
4332          $lang->tuesday,
4333          $lang->wednesday,
4334          $lang->thursday,
4335          $lang->friday,
4336          $lang->saturday
4337      );
4338  
4339      $bmonth = array(
4340          $lang->month_1,
4341          $lang->month_2,
4342          $lang->month_3,
4343          $lang->month_4,
4344          $lang->month_5,
4345          $lang->month_6,
4346          $lang->month_7,
4347          $lang->month_8,
4348          $lang->month_9,
4349          $lang->month_10,
4350          $lang->month_11,
4351          $lang->month_12
4352      );
4353  
4354  
4355      // This needs to be in this specific order
4356      $find = array(
4357          'm',
4358          'd',
4359          'D',
4360          'y',
4361          'Y',
4362          'j',
4363          'S',
4364          'F',
4365          'l',
4366          'M',
4367      );
4368  
4369      $html = array(
4370          '&#109;',
4371          '&#99;',
4372          '&#68;',
4373          '&#121;',
4374          '&#89;',
4375          '&#106;',
4376          '&#83;',
4377          '&#70;',
4378          '&#108;',
4379          '&#77;',
4380      );
4381  
4382      $bdays = str_replace($find, $html, $bdays);
4383      $bmonth = str_replace($find, $html, $bmonth);
4384  
4385      $replace = array(
4386          sprintf('%02s', $bm),
4387          sprintf('%02s', $bd),
4388          ($wd == 2 ? my_substr($bdays[$wd], 0, 4) : ($wd == 4 ? my_substr($bdays[$wd], 0, 5) : my_substr($bdays[$wd], 0, 3))),
4389          my_substr($by, 2),
4390          $by,
4391          ($bd[0] == 0 ? my_substr($bd, 1) : $bd),
4392          ($bd == 1 || $bd == 21 || $bd == 31 ? 'st' : ($bd == 2 || $bd == 22 ? 'nd' : ($bd == 3 || $bd == 23 ? 'rd' : 'th'))),
4393          $bmonth[$bm-1],
4394          $wd,
4395          ($bm == 9 ? my_substr($bmonth[$bm-1], 0, 4) :  my_substr($bmonth[$bm-1], 0, 3)),
4396      );
4397  
4398      // Do we have the full month in our output?
4399      // If so there's no need for the short month
4400      if(strpos($display, 'F') !== false)
4401      {
4402          array_pop($find);
4403          array_pop($replace);
4404      }
4405  
4406      return str_replace($find, $replace, $display);
4407  }
4408  
4409  /**
4410   * Returns the age of a user with specified birthday.
4411   *
4412   * @param string The birthday of a user.
4413   * @return float The age of a user with that birthday.
4414   */
4415  function get_age($birthday)
4416  {
4417      $bday = explode("-", $birthday);
4418      if(!$bday[2])
4419      {
4420          return;
4421      }
4422  
4423      list($day, $month, $year) = explode("-", my_date("j-n-Y", TIME_NOW, 0, 0));
4424  
4425      $age = $year-$bday[2];
4426  
4427      if(($month == $bday[1] && $day < $bday[0]) || $month < $bday[1])
4428      {
4429          --$age;
4430      }
4431      return $age;
4432  }
4433  
4434  /**
4435   * Updates the first posts in a thread.
4436   *
4437   * @param int The thread id for which to update the first post id.
4438   */
4439  function update_first_post($tid)
4440  {
4441      global $db;
4442  
4443      $query = $db->simple_select("posts", "pid,replyto", "tid='{$tid}'", array('order_by' => 'dateline', 'limit' => 1));
4444      $post = $db->fetch_array($query);
4445  
4446      if($post['replyto'] != 0)
4447      {
4448          $replyto_update = array(
4449              "replyto" => 0
4450          );
4451          $db->update_query("posts", $replyto_update, "pid='{$post['pid']}'");
4452      }
4453  
4454      $firstpostup = array(
4455          "firstpost" => $post['pid']
4456      );
4457      $db->update_query("threads", $firstpostup, "tid='$tid'");
4458  }
4459  
4460  /**
4461   * Checks for the length of a string, mb strings accounted for
4462   *
4463   * @param string The string to check the length of.
4464   * @return int The length of the string.
4465   */
4466  function my_strlen($string)
4467  {
4468      global $lang;
4469  
4470      $string = preg_replace("#&\#([0-9]+);#", "-", $string);
4471  
4472      if(strtolower($lang->settings['charset']) == "utf-8")
4473      {
4474          // Get rid of any excess RTL and LTR override for they are the workings of the devil
4475          $string = str_replace(dec_to_utf8(8238), "", $string);
4476          $string = str_replace(dec_to_utf8(8237), "", $string);
4477  
4478          // Remove dodgy whitespaces
4479          $string = str_replace(chr(0xCA), "", $string);
4480      }
4481      $string = trim($string);
4482  
4483      if(function_exists("mb_strlen"))
4484      {
4485          $string_length = mb_strlen($string);
4486      }
4487      else
4488      {
4489          $string_length = strlen($string);
4490      }
4491  
4492      return $string_length;
4493  }
4494  
4495  /**
4496   * Cuts a string at a specified point, mb strings accounted for
4497   *
4498   * @param string The string to cut.
4499   * @param int Where to cut
4500   * @param int (optional) How much to cut
4501   * @param bool (optional) Properly handle HTML entities?
4502   * @return int The cut part of the string.
4503   */
4504  function my_substr($string, $start, $length="", $handle_entities = false)
4505  {
4506      if($handle_entities)
4507      {
4508          $string = unhtmlentities($string);
4509      }
4510      if(function_exists("mb_substr"))
4511      {
4512          if($length != "")
4513          {
4514              $cut_string = mb_substr($string, $start, $length);
4515          }
4516          else
4517          {
4518              $cut_string = mb_substr($string, $start);
4519          }
4520      }
4521      else
4522      {
4523          if($length != "")
4524          {
4525              $cut_string = substr($string, $start, $length);
4526          }
4527          else
4528          {
4529              $cut_string = substr($string, $start);
4530          }
4531      }
4532  
4533      if($handle_entities)
4534      {
4535          $cut_string = htmlspecialchars_uni($cut_string);
4536      }
4537      return $cut_string;
4538  }
4539  
4540  /**
4541   * lowers the case of a string, mb strings accounted for
4542   *
4543   * @param string The string to lower.
4544   * @return int The lowered string.
4545   */
4546  function my_strtolower($string)
4547  {
4548      if(function_exists("mb_strtolower"))
4549      {
4550          $string = mb_strtolower($string);
4551      }
4552      else
4553      {
4554          $string = strtolower($string);
4555      }
4556  
4557      return $string;
4558  }
4559  
4560  /**
4561   * Finds a needle in a haystack and returns it position, mb strings accounted for
4562   *
4563   * @param string String to look in (haystack)
4564   * @param string What to look for (needle)
4565   * @param int (optional) How much to offset
4566   * @return int false on needle not found, integer position if found
4567   */
4568  function my_strpos($haystack, $needle, $offset=0)
4569  {
4570      if($needle == '')
4571      {
4572          return false;
4573      }
4574  
4575      if(function_exists("mb_strpos"))
4576      {
4577          $position = mb_strpos($haystack, $needle, $offset);
4578      }
4579      else
4580      {
4581          $position = strpos($haystack, $needle, $offset);
4582      }
4583  
4584      return $position;
4585  }
4586  
4587  /**
4588   * ups the case of a string, mb strings accounted for
4589   *
4590   * @param string The string to up.
4591   * @return int The uped string.
4592   */
4593  function my_strtoupper($string)
4594  {
4595      if(function_exists("mb_strtoupper"))
4596      {
4597          $string = mb_strtoupper($string);
4598      }
4599      else
4600      {
4601          $string = strtoupper($string);
4602      }
4603  
4604      return $string;
4605  }
4606  
4607  /**
4608   * Returns any html entities to their original character
4609   *
4610   * @param string The string to un-htmlentitize.
4611   * @return int The un-htmlentitied' string.
4612   */
4613  function unhtmlentities($string)
4614  {
4615      // Replace numeric entities
4616      $string = preg_replace_callback('~&#x([0-9a-f]+);~i', create_function('$matches', 'return unichr(hexdec($matches[1]));'), $string);
4617      $string = preg_replace_callback('~&#([0-9]+);~', create_function('$matches', 'return unichr($matches[1]);'), $string);
4618  
4619      // Replace literal entities
4620      $trans_tbl = get_html_translation_table(HTML_ENTITIES);
4621      $trans_tbl = array_flip($trans_tbl);
4622  
4623      return strtr($string, $trans_tbl);
4624  }
4625  
4626  /**
4627   * Returns any ascii to it's character (utf-8 safe).
4628   *
4629   * @param string The ascii to characterize.
4630   * @return int The characterized ascii.
4631   */
4632  function unichr($c)
4633  {
4634      if($c <= 0x7F)
4635      {
4636          return chr($c);
4637      }
4638      else if($c <= 0x7FF)
4639      {
4640          return chr(0xC0 | $c >> 6) . chr(0x80 | $c & 0x3F);
4641      }
4642      else if($c <= 0xFFFF)
4643      {
4644          return chr(0xE0 | $c >> 12) . chr(0x80 | $c >> 6 & 0x3F)
4645                                      . chr(0x80 | $c & 0x3F);
4646      }
4647      else if($c <= 0x10FFFF)
4648      {
4649          return chr(0xF0 | $c >> 18) . chr(0x80 | $c >> 12 & 0x3F)
4650                                      . chr(0x80 | $c >> 6 & 0x3F)
4651                                      . chr(0x80 | $c & 0x3F);
4652      }
4653      else
4654      {
4655          return false;
4656      }
4657  }
4658  
4659  /**
4660   * Get the event poster.
4661   *
4662   * @param array The event data array.
4663   * @return string The link to the event poster.
4664   */
4665  function get_event_poster($event)
4666  {
4667      $event['username'] = format_name($event['username'], $event['usergroup'], $event['displaygroup']);
4668      $event_poster = build_profile_link($event['username'], $event['author']);
4669      return $event_poster;
4670  }
4671  
4672  /**
4673   * Get the event date.
4674   *
4675   * @param array The event data array.
4676   * @return string The event date.
4677   */
4678  function get_event_date($event)
4679  {
4680      global $mybb;
4681  
4682      $event_date = explode("-", $event['date']);
4683      $event_date = mktime(0, 0, 0, $event_date[1], $event_date[0], $event_date[2]);
4684      $event_date = my_date($mybb->settings['dateformat'], $event_date);
4685  
4686      return $event_date;
4687  }
4688  
4689  /**
4690   * Get the profile link.
4691   *
4692   * @param int The user id of the profile.
4693   * @return string The url to the profile.
4694   */
4695  function get_profile_link($uid=0)
4696  {
4697      $link = str_replace("{uid}", $uid, PROFILE_URL);
4698      return htmlspecialchars_uni($link);
4699  }
4700  
4701  /**
4702   * Get the announcement link.
4703   *
4704   * @param int The announement id of the announcement.
4705   * @return string The url to the announcement.
4706   */
4707  function get_announcement_link($aid=0)
4708  {
4709      $link = str_replace("{aid}", $aid, ANNOUNCEMENT_URL);
4710      return htmlspecialchars_uni($link);
4711  }
4712  
4713  /**
4714   * Build the profile link.
4715   *
4716   * @param string The Username of the profile.
4717   * @param int The user id of the profile.
4718   * @param string The target frame
4719   * @param string Any onclick javascript.
4720   * @return string The complete profile link.
4721   */
4722  function build_profile_link($username="", $uid=0, $target="", $onclick="")
4723  {
4724      global $mybb, $lang;
4725  
4726      if(!$username && $uid == 0)
4727      {
4728          // Return Guest phrase for no UID, no guest nickname
4729          return $lang->guest;
4730      }
4731      elseif($uid == 0)
4732      {
4733          // Return the guest's nickname if user is a guest but has a nickname
4734          return $username;
4735      }
4736      else
4737      {
4738          // Build the profile link for the registered user
4739          if(!empty($target))
4740          {
4741              $target = " target=\"{$target}\"";
4742          }
4743  
4744          if(!empty($onclick))
4745          {
4746              $onclick = " onclick=\"{$onclick}\"";
4747          }
4748  
4749          return "<a href=\"{$mybb->settings['bburl']}/".get_profile_link($uid)."\"{$target}{$onclick}>{$username}</a>";
4750      }
4751  }
4752  
4753  /**
4754   * Build the forum link.
4755   *
4756   * @param int The forum id of the forum.
4757   * @param int (Optional) The page number of the forum.
4758   * @return string The url to the forum.
4759   */
4760  function get_forum_link($fid, $page=0)
4761  {
4762      if($page > 0)
4763      {
4764          $link = str_replace("{fid}", $fid, FORUM_URL_PAGED);
4765          $link = str_replace("{page}", $page, $link);
4766          return htmlspecialchars_uni($link);
4767      }
4768      else
4769      {
4770          $link = str_replace("{fid}", $fid, FORUM_URL);
4771          return htmlspecialchars_uni($link);
4772      }
4773  }
4774  
4775  /**
4776   * Build the thread link.
4777   *
4778   * @param int The thread id of the thread.
4779   * @param int (Optional) The page number of the thread.
4780   * @param string (Optional) The action we're performing (ex, lastpost, newpost, etc)
4781   * @return string The url to the thread.
4782   */
4783  function get_thread_link($tid, $page=0, $action='')
4784  {
4785      if($page > 1)
4786      {
4787          if($action)
4788          {
4789              $link = THREAD_URL_ACTION;
4790              $link = str_replace("{action}", $action, $link);
4791          }
4792          else
4793          {
4794              $link = THREAD_URL_PAGED;
4795          }
4796          $link = str_replace("{tid}", $tid, $link);
4797          $link = str_replace("{page}", $page, $link);
4798          return htmlspecialchars_uni($link);
4799      }
4800      else
4801      {
4802          if($action)
4803          {
4804              $link = THREAD_URL_ACTION;
4805              $link = str_replace("{action}", $action, $link);
4806          }
4807          else
4808          {
4809              $link = THREAD_URL;
4810          }
4811          $link = str_replace("{tid}", $tid, $link);
4812          return htmlspecialchars_uni($link);
4813      }
4814  }
4815  
4816  /**
4817   * Build the post link.
4818   *
4819   * @param int The post ID of the post
4820   * @param int The thread id of the post.
4821   */
4822  function get_post_link($pid, $tid=0)
4823  {
4824      if($tid > 0)
4825      {
4826          $link = str_replace("{tid}", $tid, THREAD_URL_POST);
4827          $link = str_replace("{pid}", $pid, $link);
4828          return htmlspecialchars_uni($link);
4829      }
4830      else
4831      {
4832          $link = str_replace("{pid}", $pid, POST_URL);
4833          return htmlspecialchars_uni($link);
4834      }
4835  }
4836  
4837  /**
4838   * Build the event link.
4839   *
4840   * @param int The event ID of the event
4841   * @return string The URL of the event
4842   */
4843  function get_event_link($eid)
4844  {
4845      $link = str_replace("{eid}", $eid, EVENT_URL);
4846      return htmlspecialchars_uni($link);
4847  }
4848  
4849  /**
4850   * Build the link to a specified date on the calendar
4851   *
4852   * @param int The ID of the calendar
4853   * @param int The year
4854   * @param int The month
4855   * @param int The day (optional)
4856   * @return string The URL of the calendar
4857   */
4858  function get_calendar_link($calendar, $year=0, $month=0, $day=0)
4859  {
4860      if($day > 0)
4861      {
4862          $link = str_replace("{month}", $month, CALENDAR_URL_DAY);
4863          $link = str_replace("{year}", $year, $link);
4864          $link = str_replace("{day}", $day, $link);
4865          $link = str_replace("{calendar}", $calendar, $link);
4866          return htmlspecialchars_uni($link);
4867      }
4868      else if($month > 0)
4869      {
4870          $link = str_replace("{month}", $month, CALENDAR_URL_MONTH);
4871          $link = str_replace("{year}", $year, $link);
4872          $link = str_replace("{calendar}", $calendar, $link);
4873          return htmlspecialchars_uni($link);
4874      }
4875      else if($year > 0)
4876      {
4877          $link = str_replace("{year}", $year, CALENDAR_URL_YEAR);
4878          $link = str_replace("{calendar}", $calendar, $link);
4879          return htmlspecialchars_uni($link);
4880      }
4881      else
4882      {
4883          $link = str_replace("{calendar}", $calendar, CALENDAR_URL);
4884          return htmlspecialchars_uni($link);
4885      }
4886  }
4887  
4888  /**
4889   * Build the link to a specified week on the calendar
4890   *
4891   * @param int The ID of the calendar
4892   * @param int The year
4893   * @param int The week
4894   * @return string The URL of the calendar
4895   */
4896  function get_calendar_week_link($calendar, $week)
4897  {
4898      if($week < 0)
4899      {
4900          $week = str_replace('-', "n", $week);
4901      }
4902      $link = str_replace("{week}", $week, CALENDAR_URL_WEEK);
4903      $link = str_replace("{calendar}", $calendar, $link);
4904      return htmlspecialchars_uni($link);
4905  }
4906  
4907  /**
4908   * Get the user data of a user id.
4909   *
4910   * @param int The user id of the user.
4911   * @return array The users data
4912   */
4913  function get_user($uid)
4914  {
4915      global $mybb, $db;
4916      static $user_cache;
4917  
4918      $uid = intval($uid);
4919  
4920      if($uid == $mybb->user['uid'])
4921      {
4922          return $mybb->user;
4923      }
4924      elseif(isset($user_cache[$uid]))
4925      {
4926          return $user_cache[$uid];
4927      }
4928      elseif(($uid > 0))
4929      {
4930          $query = $db->simple_select("users", "*", "uid='{$uid}'");
4931          $user_cache[$uid] = $db->fetch_array($query);
4932  
4933          return $user_cache[$uid];
4934      }
4935      return array();
4936  }
4937  
4938  /**
4939   * Get the forum of a specific forum id.
4940   *
4941   * @param int The forum id of the forum.
4942   * @param int (Optional) If set to 1, will override the active forum status
4943   * @return array The database row of a forum.
4944   */
4945  function get_forum($fid, $active_override=0)
4946  {
4947      global $cache;
4948      static $forum_cache;
4949  
4950      if(!isset($forum_cache) || is_array($forum_cache))
4951      {
4952          $forum_cache = $cache->read("forums");
4953      }
4954  
4955      if(!$forum_cache[$fid])
4956      {
4957          return false;
4958      }
4959  
4960      if($active_override != 1)
4961      {
4962          $parents = explode(",", $forum_cache[$fid]['parentlist']);
4963          if(is_array($parents))
4964          {
4965              foreach($parents as $parent)
4966              {
4967                  if($forum_cache[$parent]['active'] == 0)
4968                  {
4969                      return false;
4970                  }
4971              }
4972          }
4973      }
4974  
4975      return $forum_cache[$fid];
4976  }
4977  
4978  /**
4979   * Get the thread of a thread id.
4980   *
4981   * @param int The thread id of the thread.
4982   * @param boolean Whether or not to recache the thread.
4983   * @return string The database row of the thread.
4984   */
4985  function get_thread($tid, $recache = false)
4986  {
4987      global $db;
4988      static $thread_cache;
4989  
4990      if(isset($thread_cache[$tid]) && !$recache)
4991      {
4992          return $thread_cache[$tid];
4993      }
4994      else
4995      {
4996          $query = $db->simple_select("threads", "*", "tid='".intval($tid)."'");
4997          $thread = $db->fetch_array($query);
4998  
4999          if($thread)
5000          {
5001              $thread_cache[$tid] = $thread;
5002              return $thread;
5003          }
5004          else
5005          {
5006              $thread_cache[$tid] = false;
5007              return false;
5008          }
5009      }
5010  }
5011  
5012  /**
5013   * Get the post of a post id.
5014   *
5015   * @param int The post id of the post.
5016   * @return string The database row of the post.
5017   */
5018  function get_post($pid)
5019  {
5020      global $db;
5021      static $post_cache;
5022  
5023      if(isset($post_cache[$pid]))
5024      {
5025          return $post_cache[$pid];
5026      }
5027      else
5028      {
5029          $query = $db->simple_select("posts", "*", "pid='".intval($pid)."'");
5030          $post = $db->fetch_array($query);
5031  
5032          if($post)
5033          {
5034              $post_cache[$pid] = $post;
5035              return $post;
5036          }
5037          else
5038          {
5039              $post_cache[$pid] = false;
5040              return false;
5041          }
5042      }
5043  }
5044  
5045  /**
5046   * Get inactivate forums.
5047   *
5048   * @return string The comma separated values of the inactivate forum.
5049   */
5050  function get_inactive_forums()
5051  {
5052      global $forum_cache, $cache, $inactiveforums;
5053  
5054      if(!$forum_cache)
5055      {
5056          cache_forums();
5057      }
5058  
5059      $inactive = array();
5060  
5061      foreach($forum_cache as $fid => $forum)
5062      {
5063          if($forum['active'] == 0)
5064          {
5065              $inactive[] = $fid;
5066              foreach($forum_cache as $fid1 => $forum1)
5067              {
5068                  if(my_strpos(",".$forum1['parentlist'].",", ",".$fid.",") !== false && !in_array($fid1, $inactive))
5069                  {
5070                      $inactive[] = $fid1;
5071                  }
5072              }
5073          }
5074      }
5075      $inactiveforums = implode(",", $inactive);
5076  
5077      return $inactiveforums;
5078  }
5079  
5080  /**
5081   * Checks to make sure a user has not tried to login more times than permitted
5082   * Will stop execution with call to error() unless
5083   *
5084   * @param bool (Optional) The function will stop execution if it finds an error with the login. Default is True
5085   * @return bool Number of logins when success, false if failed.
5086   */
5087  function login_attempt_check($fatal = true)
5088  {
5089      global $mybb, $lang, $session, $db;
5090  
5091      if($mybb->settings['failedlogincount'] == 0)
5092      {
5093          return 1;
5094      }
5095      // Note: Number of logins is defaulted to 1, because using 0 seems to clear cookie data. Not really a problem as long as we account for 1 being default.
5096  
5097      // Use cookie if possible, otherwise use session
5098      // Find better solution to prevent clearing cookies
5099      $loginattempts = 0;
5100      $failedlogin = 0;
5101  
5102      if(!empty($mybb->cookies['loginattempts']))
5103      {
5104          $loginattempts = $mybb->cookies['loginattempts'];
5105      }
5106  
5107      if(!empty($mybb->cookies['failedlogin']))
5108      {
5109          $failedlogin = $mybb->cookies['failedlogin'];
5110      }
5111  
5112      // Work out if the user has had more than the allowed number of login attempts
5113      if($loginattempts > $mybb->settings['failedlogincount'])
5114      {
5115          // If so, then we need to work out if they can try to login again
5116          // Some maths to work out how long they have left and display it to them
5117          $now = TIME_NOW;
5118  
5119          if(empty($mybb->cookies['failedlogin']))
5120          {
5121              $failedtime = $now;
5122          }
5123          else
5124          {
5125              $failedtime = $mybb->cookies['failedlogin'];
5126          }
5127  
5128          $secondsleft = $mybb->settings['failedlogintime'] * 60 + $failedtime - $now;
5129          $hoursleft = floor($secondsleft / 3600);
5130          $minsleft = floor(($secondsleft / 60) % 60);
5131          $secsleft = floor($secondsleft % 60);
5132  
5133          // This value will be empty the first time the user doesn't login in, set it
5134          if(empty($failedlogin))
5135          {
5136              my_setcookie('failedlogin', $now);
5137              if($fatal)
5138              {
5139                  error($lang->sprintf($lang->failed_login_wait, $hoursleft, $minsleft, $secsleft));
5140              }
5141  
5142              return false;
5143          }
5144  
5145          // Work out if the user has waited long enough before letting them login again
5146          if($mybb->cookies['failedlogin'] < ($now - $mybb->settings['failedlogintime'] * 60))
5147          {
5148              my_setcookie('loginattempts', 1);
5149              my_unsetcookie('failedlogin');
5150              if($mybb->user['uid'] != 0)
5151              {
5152                  $update_array = array(
5153                      'loginattempts' => 1
5154                  );
5155                  $db->update_query("users", $update_array, "uid = '{$mybb->user['uid']}'");
5156              }
5157              return 1;
5158          }
5159          // Not waited long enough
5160          else if($mybb->cookies['failedlogin'] > ($now - $mybb->settings['failedlogintime'] * 60))
5161          {
5162              if($fatal)
5163              {
5164                  error($lang->sprintf($lang->failed_login_wait, $hoursleft, $minsleft, $secsleft));
5165              }
5166  
5167              return false;
5168          }
5169      }
5170  
5171      // User can attempt another login
5172      return $loginattempts;
5173  }
5174  
5175  /**
5176   * Validates the format of an email address.
5177   *
5178   * @param string The string to check.
5179   * @return boolean True when valid, false when invalid.
5180   */
5181  function validate_email_format($email)
5182  {
5183      if(strpos($email, ' ') !== false)
5184      {
5185          return false;
5186      }
5187      // Valid local characters for email addresses: http://www.remote.org/jochen/mail/info/chars.html
5188      return preg_match("/^[a-zA-Z0-9&*+\-_.{}~^\?=\/]+@[a-zA-Z0-9-]+\.([a-zA-Z0-9-]+\.)*[a-zA-Z0-9-]{2,}$/si", $email);
5189  }
5190  
5191  /**
5192   * Checks to see if the email is already in use by another
5193   *
5194   * @param string The email to check.
5195   * @param string User ID of the user (updating only)
5196   * @return boolean True when in use, false when not.
5197   */
5198  function email_already_in_use($email, $uid="")
5199  {
5200      global $db;
5201  
5202      $uid_string = "";
5203      if($uid)
5204      {
5205          $uid_string = " AND uid != '".intval($uid)."'";
5206      }
5207      $query = $db->simple_select("users", "COUNT(email) as emails", "email = '".$db->escape_string($email)."'{$uid_string}");
5208  
5209      if($db->fetch_field($query, "emails") > 0)
5210      {
5211          return true;
5212      }
5213  
5214      return false;
5215  }
5216  
5217  /*
5218   * DEPRECATED! ONLY INCLUDED FOR COMPATIBILITY PURPOSES.
5219   */
5220  function rebuildsettings()
5221  {
5222      rebuild_settings();
5223  }
5224  
5225  /**
5226   * Rebuilds settings.php
5227   *
5228   */
5229  function rebuild_settings()
5230  {
5231      global $db, $mybb;
5232  
5233      if(!file_exists(MYBB_ROOT."inc/settings.php"))
5234      {
5235          $mode = "x";
5236      }
5237      else
5238      {
5239          $mode = "w";
5240      }
5241  
5242      $options = array(
5243          "order_by" => "title",
5244          "order_dir" => "ASC"
5245      );
5246      $query = $db->simple_select("settings", "value, name", "", $options);
5247  
5248      while($setting = $db->fetch_array($query))
5249      {
5250          $mybb->settings[$setting['name']] = $setting['value'];
5251          $setting['value'] = addcslashes($setting['value'], '\\"$');
5252          $settings .= "\$settings['{$setting['name']}'] = \"{$setting['value']}\";\n";
5253      }
5254  
5255      $settings = "<"."?php\n/*********************************\ \n  DO NOT EDIT THIS FILE, PLEASE USE\n  THE SETTINGS EDITOR\n\*********************************/\n\n$settings\n?".">";
5256      $file = @fopen(MYBB_ROOT."inc/settings.php", $mode);
5257      @fwrite($file, $settings);
5258      @fclose($file);
5259  
5260      $GLOBALS['settings'] = &$mybb->settings;
5261  }
5262  
5263  /**
5264   * Build a PREG compatible array of search highlight terms to replace in posts.
5265   *
5266   * @param string Incoming terms to highlight
5267   * @return array PREG compatible array of terms
5268   */
5269  function build_highlight_array($terms)
5270  {
5271      global $mybb;
5272  
5273      if($mybb->settings['minsearchword'] < 1)
5274      {
5275          $mybb->settings['minsearchword'] = 3;
5276      }
5277  
5278      if(is_array($terms))
5279      {
5280          $terms = implode(' ', $terms);
5281      }
5282  
5283      // Strip out any characters that shouldn't be included
5284      $bad_characters = array(
5285          "(",
5286          ")",
5287          "+",
5288          "-",
5289          "~"
5290      );
5291      $terms = str_replace($bad_characters, '', $terms);
5292  
5293      // Check if this is a "series of words" - should be treated as an EXACT match
5294      if(my_strpos($terms, "\"") !== false)
5295      {
5296          $inquote = false;
5297          $terms = explode("\"", $terms);
5298          foreach($terms as $phrase)
5299          {
5300              $phrase = htmlspecialchars_uni($phrase);
5301              if($phrase != "")
5302              {
5303                  if($inquote)
5304                  {
5305                      $words[] = trim($phrase);
5306                  }
5307                  else
5308                  {
5309                      $split_words = preg_split("#\s{1,}#", $phrase, -1);
5310                      if(!is_array($split_words))
5311                      {
5312                          continue;
5313                      }
5314                      foreach($split_words as $word)
5315                      {
5316                          if(!$word || strlen($word) < $mybb->settings['minsearchword'])
5317                          {
5318                              continue;
5319                          }
5320                          $words[] = trim($word);
5321                      }
5322                  }
5323              }
5324              $inquote = !$inquote;
5325          }
5326      }
5327      // Otherwise just a simple search query with no phrases
5328      else
5329      {
5330          $terms = htmlspecialchars_uni($terms);
5331          $split_words = preg_split("#\s{1,}#", $terms, -1);
5332          if(is_array($split_words))
5333          {
5334              foreach($split_words as $word)
5335              {
5336                  if(!$word || strlen($word) < $mybb->settings['minsearchword'])
5337                  {
5338                      continue;
5339                  }
5340                  $words[] = trim($word);
5341              }
5342          }
5343      }
5344  
5345      if(!is_array($words))
5346      {
5347          return false;
5348      }
5349  
5350      // Sort the word array by length. Largest terms go first and work their way down to the smallest term.
5351      // This resolves problems like "test tes" where "tes" will be highlighted first, then "test" can't be highlighted because of the changed html
5352      usort($words, create_function('$a,$b', 'return strlen($b) - strlen($a);'));
5353  
5354      // Loop through our words to build the PREG compatible strings
5355      foreach($words as $word)
5356      {
5357          $word = trim($word);
5358  
5359          $word = my_strtolower($word);
5360  
5361          // Special boolean operators should be stripped
5362          if($word == "" || $word == "or" || $word == "not" || $word == "and")
5363          {
5364              continue;
5365          }
5366  
5367          // Now make PREG compatible
5368          $find = "#(?!<.*?)(".preg_quote($word, "#").")(?![^<>]*?>)#ui";
5369          $replacement = "<span class=\"highlight\" style=\"padding-left: 0px; padding-right: 0px;\">$1</span>";
5370          $highlight_cache[$find] = $replacement;
5371      }
5372  
5373      return $highlight_cache;
5374  }
5375  
5376  /**
5377   * Converts a decimal reference of a character to its UTF-8 equivalent
5378   * (Code by Anne van Kesteren, http://annevankesteren.nl/2005/05/character-references)
5379   *
5380   * @param string Decimal value of a character reference
5381   */
5382  function dec_to_utf8($src)
5383  {
5384      $dest = '';
5385  
5386      if($src < 0)
5387      {
5388          return false;
5389      }
5390      elseif($src <= 0x007f)
5391      {
5392          $dest .= chr($src);
5393      }
5394      elseif($src <= 0x07ff)
5395      {
5396          $dest .= chr(0xc0 | ($src >> 6));
5397          $dest .= chr(0x80 | ($src & 0x003f));
5398      }
5399      elseif($src <= 0xffff)
5400      {
5401          $dest .= chr(0xe0 | ($src >> 12));
5402          $dest .= chr(0x80 | (($src >> 6) & 0x003f));
5403          $dest .= chr(0x80 | ($src & 0x003f));
5404      }
5405      elseif($src <= 0x10ffff)
5406      {
5407          $dest .= chr(0xf0 | ($src >> 18));
5408          $dest .= chr(0x80 | (($src >> 12) & 0x3f));
5409          $dest .= chr(0x80 | (($src >> 6) & 0x3f));
5410          $dest .= chr(0x80 | ($src & 0x3f));
5411      }
5412      else
5413      {
5414          // Out of range
5415          return false;
5416      }
5417  
5418      return $dest;
5419  }
5420  
5421  /**
5422   * Checks if a username has been disallowed for registration/use.
5423   *
5424   * @param string The username
5425   * @param boolean True if the 'last used' dateline should be updated if a match is found.
5426   * @return boolean True if banned, false if not banned
5427   */
5428  function is_banned_username($username, $update_lastuse=false)
5429  {
5430      global $db;
5431      $query = $db->simple_select('banfilters', 'filter, fid', "type='2'");
5432      while($banned_username = $db->fetch_array($query))
5433      {
5434          // Make regular expression * match
5435          $banned_username['filter'] = str_replace('\*', '(.*)', preg_quote($banned_username['filter'], '#'));
5436          if(preg_match("#(^|\b){$banned_username['filter']}($|\b)#i", $username))
5437          {
5438              // Updating last use
5439              if($update_lastuse == true)
5440              {
5441                  $db->update_query("banfilters", array("lastuse" => TIME_NOW), "fid='{$banned_username['fid']}'");
5442              }
5443              return true;
5444          }
5445      }
5446      // Still here - good username
5447      return false;
5448  }
5449  
5450  /**
5451   * Check if a specific email address has been banned.
5452   *
5453   * @param string The email address.
5454   * @param boolean True if the 'last used' dateline should be updated if a match is found.
5455   * @return boolean True if banned, false if not banned
5456   */
5457  function is_banned_email($email, $update_lastuse=false)
5458  {
5459      global $cache, $db;
5460  
5461      $banned_cache = $cache->read("bannedemails");
5462  
5463      if($banned_cache === false)
5464      {
5465          // Failed to read cache, see if we can rebuild it
5466          $cache->update_bannedemails();
5467          $banned_cache = $cache->read("bannedemails");
5468      }
5469  
5470      if(is_array($banned_cache) && !empty($banned_cache))
5471      {
5472          foreach($banned_cache as $banned_email)
5473          {
5474              // Make regular expression * match
5475              $banned_email['filter'] = str_replace('\*', '(.*)', preg_quote($banned_email['filter'], '#'));
5476  
5477              if(preg_match("#{$banned_email['filter']}#i", $email))
5478              {
5479                  // Updating last use
5480                  if($update_lastuse == true)
5481                  {
5482                      $db->update_query("banfilters", array("lastuse" => TIME_NOW), "fid='{$banned_email['fid']}'");
5483                  }
5484                  return true;
5485              }
5486          }
5487      }
5488  
5489      // Still here - good email
5490      return false;
5491  }
5492  
5493  /**
5494   * Checks if a specific IP address has been banned.
5495   *
5496   * @param string The IP address.
5497   * @param boolean True if the 'last used' dateline should be updated if a match is found.
5498   * @return boolean True if banned, false if not banned.
5499   */
5500  function is_banned_ip($ip_address, $update_lastuse=false)
5501  {
5502      global $db, $cache;
5503  
5504      $banned_ips = $cache->read("bannedips");
5505      if(!is_array($banned_ips))
5506      {
5507          return false;
5508      }
5509  
5510      foreach($banned_ips as $banned_ip)
5511      {
5512          if(!$banned_ip['filter'])
5513          {
5514              continue;
5515          }
5516  
5517          // Make regular expression * match
5518          $banned_ip['filter'] = str_replace('\*', '(.*)', preg_quote($banned_ip['filter'], '#'));
5519          if(preg_match("#^{$banned_ip['filter']}$#i", $ip_address))
5520          {
5521              // Updating last use
5522              if($update_lastuse == true)
5523              {
5524                  $db->update_query("banfilters", array("lastuse" => TIME_NOW), "fid='{$banned_ip['fid']}'");
5525              }
5526              return true;
5527          }
5528      }
5529  
5530      // Still here - good ip
5531      return false;
5532  }
5533  
5534  /**
5535   * Build a time zone selection list.
5536   *
5537   * @param string The name of the select
5538   * @param int The selected time zone (defaults to GMT)
5539   * @param boolean True to generate a "short" list with just timezone and current time
5540   */
5541  function build_timezone_select($name, $selected=0, $short=false)
5542  {
5543      global $mybb, $lang;
5544  
5545      $timezones = array(
5546          "-12" => $lang->timezone_gmt_minus_1200,
5547          "-11" => $lang->timezone_gmt_minus_1100,
5548          "-10" => $lang->timezone_gmt_minus_1000,
5549          "-9" => $lang->timezone_gmt_minus_900,
5550          "-8" => $lang->timezone_gmt_minus_800,
5551          "-7" => $lang->timezone_gmt_minus_700,
5552          "-6" => $lang->timezone_gmt_minus_600,
5553          "-5" => $lang->timezone_gmt_minus_500,
5554          "-4.5" => $lang->timezone_gmt_minus_450,
5555          "-4" => $lang->timezone_gmt_minus_400,
5556          "-3.5" => $lang->timezone_gmt_minus_350,
5557          "-3" => $lang->timezone_gmt_minus_300,
5558          "-2" => $lang->timezone_gmt_minus_200,
5559          "-1" => $lang->timezone_gmt_minus_100,
5560          "0" => $lang->timezone_gmt,
5561          "1" => $lang->timezone_gmt_100,
5562          "2" => $lang->timezone_gmt_200,
5563          "3" => $lang->timezone_gmt_300,
5564          "3.5" => $lang->timezone_gmt_350,
5565          "4" => $lang->timezone_gmt_400,
5566          "4.5" => $lang->timezone_gmt_450,
5567          "5" => $lang->timezone_gmt_500,
5568          "5.5" => $lang->timezone_gmt_550,
5569          "6" => $lang->timezone_gmt_600,
5570          "7" => $lang->timezone_gmt_700,
5571          "8" => $lang->timezone_gmt_800,
5572          "9" => $lang->timezone_gmt_900,
5573          "9.5" => $lang->timezone_gmt_950,
5574          "10" => $lang->timezone_gmt_1000,
5575          "11" => $lang->timezone_gmt_1100,
5576          "12" => $lang->timezone_gmt_1200
5577      );
5578  
5579      $selected = str_replace("+", "", $selected);
5580      $select = "<select name=\"{$name}\" id=\"{$name}\">\n";
5581      foreach($timezones as $timezone => $label)
5582      {
5583          $selected_add = "";
5584          if($selected == $timezone)
5585          {
5586              $selected_add = " selected=\"selected\"";
5587          }
5588          if($short == true)
5589          {
5590              $label = '';
5591              if($timezone != 0)
5592              {
5593                  $label = $timezone;
5594                  if($timezone > 0)
5595                  {
5596                      $label = "+{$label}";
5597                  }
5598                  if(strpos($timezone, ".") !== false)
5599                  {
5600                      $label = str_replace(".", ":", $label);
5601                      $label = str_replace(":5", ":30", $label);
5602                  }
5603                  else
5604                  {
5605                      $label .= ":00";
5606                  }
5607              }
5608              $time_in_zone = my_date($mybb->settings['timeformat'], TIME_NOW, $timezone);
5609              $label = $lang->sprintf($lang->timezone_gmt_short, $label." ", $time_in_zone);
5610          }
5611          $select .= "<option value=\"{$timezone}\"{$selected_add}>{$label}</option>\n";
5612      }
5613      $select .= "</select>";
5614      return $select;
5615  }
5616  
5617  /**
5618   * Fetch the contents of a remote fle.
5619   *
5620   * @param string The URL of the remote file
5621   * @return string The remote file contents.
5622   */
5623  function fetch_remote_file($url, $post_data=array())
5624  {
5625      $post_body = '';
5626      if(!empty($post_data))
5627      {
5628          foreach($post_data as $key => $val)
5629          {
5630              $post_body .= '&'.urlencode($key).'='.urlencode($val);
5631          }
5632          $post_body = ltrim($post_body, '&');
5633      }
5634  
5635      if(function_exists("curl_init"))
5636      {
5637          $ch = curl_init();
5638          curl_setopt($ch, CURLOPT_URL, $url);
5639          curl_setopt($ch, CURLOPT_HEADER, 0);
5640          curl_setopt($ch, CURLOPT_TIMEOUT, 10);
5641          curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
5642          if(!empty($post_body))
5643          {
5644              curl_setopt($ch, CURLOPT_POST, 1);
5645              curl_setopt($ch, CURLOPT_POSTFIELDS, $post_body);
5646          }
5647          $data = curl_exec($ch);
5648          curl_close($ch);
5649          return $data;
5650      }
5651      else if(function_exists("fsockopen"))
5652      {
5653          $url = @parse_url($url);
5654          if(!$url['host'])
5655          {
5656              return false;
5657          }
5658          if(!$url['port'])
5659          {
5660              $url['port'] = 80;
5661          }
5662          if(!$url['path'])
5663          {
5664              $url['path'] = "/";
5665          }
5666          if($url['query'])
5667          {
5668              $url['path'] .= "?{$url['query']}";
5669          }
5670          $fp = @fsockopen($url['host'], $url['port'], $error_no, $error, 10);
5671          @stream_set_timeout($fp, 10);
5672          if(!$fp)
5673          {
5674              return false;
5675          }
5676          $headers = array();
5677          if(!empty($post_body))
5678          {
5679              $headers[] = "POST {$url['path']} HTTP/1.0";
5680              $headers[] = "Content-Length: ".strlen($post_body);
5681              $headers[] = "Content-Type: application/x-www-form-urlencoded";
5682          }
5683          else
5684          {
5685              $headers[] = "GET {$url['path']} HTTP/1.0";
5686          }
5687  
5688          $headers[] = "Host: {$url['host']}";
5689          $headers[] = "Connection: Close";
5690          $headers[] = '';
5691  
5692          if(!empty($post_body))
5693          {
5694              $headers[] = $post_body;
5695          }
5696          else
5697          {
5698              // If we have no post body, we need to add an empty element to make sure we've got \r\n\r\n before the (non-existent) body starts
5699              $headers[] = '';
5700          }
5701  
5702          $headers = implode("\r\n", $headers);
5703          if(!@fwrite($fp, $headers))
5704          {
5705              return false;
5706          }
5707          while(!feof($fp))
5708          {
5709              $data .= fgets($fp, 12800);
5710          }
5711          fclose($fp);
5712          $data = explode("\r\n\r\n", $data, 2);
5713          return $data[1];
5714      }
5715      else if(empty($post_data))
5716      {
5717          return @implode("", @file($url));
5718      }
5719      else
5720      {
5721          return false;
5722      }
5723  }
5724  
5725  /**
5726   * Checks if a particular user is a super administrator.
5727   *
5728   * @param int The user ID to check against the list of super admins
5729   * @return boolean True if a super admin, false if not
5730   */
5731  function is_super_admin($uid)
5732  {
5733      global $mybb;
5734  
5735      $mybb->config['super_admins'] = str_replace(" ", "", $mybb->config['super_admins']);
5736      if(my_strpos(",{$mybb->config['super_admins']},", ",{$uid},") === false)
5737      {
5738          return false;
5739      }
5740      else
5741      {
5742          return true;
5743      }
5744  }
5745  
5746  /**
5747   * Split a string based on the specified delimeter, ignoring said delimeter in escaped strings.
5748   * Ex: the "quick brown fox" jumped, could return 1 => the, 2 => quick brown fox, 3 => jumped
5749   *
5750   * @param string The delimeter to split by
5751   * @param string The string to split
5752   * @param string The escape character or string if we have one.
5753   * @return array Array of split string
5754   */
5755  function escaped_explode($delimeter, $string, $escape="")
5756  {
5757      $strings = array();
5758      $original = $string;
5759      $in_escape = false;
5760      if($escape)
5761      {
5762          if(is_array($escape))
5763          {
5764  			function escaped_explode_escape($string)
5765              {
5766                  return preg_quote($string, "#");
5767              }
5768              $escape_preg = "(".implode("|", array_map("escaped_explode_escape", $escape)).")";
5769          }
5770          else
5771          {
5772              $escape_preg = preg_quote($escape, "#");
5773          }
5774          $quoted_strings = preg_split("#(?<!\\\){$escape_preg}#", $string);
5775      }
5776      else
5777      {
5778          $quoted_strings = array($string);
5779      }
5780      foreach($quoted_strings as $string)
5781      {
5782          if($string != "")
5783          {
5784              if($in_escape)
5785              {
5786                  $strings[] = trim($string);
5787              }
5788              else
5789              {
5790                  $split_strings = explode($delimeter, $string);
5791                  foreach($split_strings as $string)
5792                  {
5793                      if($string == "") continue;
5794                      $strings[] = trim($string);
5795                  }
5796              }
5797          }
5798          $in_escape = !$in_escape;
5799      }
5800      if(!count($strings))
5801      {
5802          return $original;
5803      }
5804      return $strings;
5805  }
5806  
5807  /**
5808   * Fetch an IPv4 long formatted range for searching IPv4 IP addresses.
5809   *
5810   * @param string The IP address to convert to a range based LONG
5811   * @rturn mixed If a full IP address is provided, the ip2long equivalent, otherwise an array of the upper & lower extremities of the IP
5812   */
5813  function fetch_longipv4_range($ip)
5814  {
5815      $ip_bits = explode(".", $ip);
5816      $ip_string1 = $ip_string2 = "";
5817  
5818      if($ip == "*")
5819      {
5820          return array(my_ip2long('128.0.0.0'), my_ip2long('127.255.255.255'));
5821      }
5822  
5823      if(strpos($ip, ".*") === false)
5824      {
5825          $ip = str_replace("*", "", $ip);
5826          if(count($ip_bits) == 4)
5827          {
5828              return my_ip2long($ip);
5829          }
5830          else
5831          {
5832              return array(my_ip2long($ip.".0"), my_ip2long($ip.".255"));
5833          }
5834      }
5835      // Wildcard based IP provided
5836      else
5837      {
5838          $sep = "";
5839          foreach($ip_bits as $piece)
5840          {
5841              if($piece == "*")
5842              {
5843                  $ip_string1 .= $sep."0";
5844                  $ip_string2 .= $sep."255";
5845              }
5846              else
5847              {
5848                  $ip_string1 .= $sep.$piece;
5849                  $ip_string2 .= $sep.$piece;
5850              }
5851              $sep = ".";
5852          }
5853          return array(my_ip2long($ip_string1), my_ip2long($ip_string2));
5854      }
5855  }
5856  
5857  /**
5858   * Fetch a list of ban times for a user account.
5859   *
5860   * @return array Array of ban times
5861   */
5862  function fetch_ban_times()
5863  {
5864      global $plugins, $lang;
5865  
5866      // Days-Months-Years
5867      $ban_times = array(
5868          "1-0-0" => "1 {$lang->day}",
5869          "2-0-0" => "2 {$lang->days}",
5870          "3-0-0" => "3 {$lang->days}",
5871          "4-0-0" => "4 {$lang->days}",
5872          "5-0-0" => "5 {$lang->days}",
5873          "6-0-0" => "6 {$lang->days}",
5874          "7-0-0" => "1 {$lang->week}",
5875          "14-0-0" => "2 {$lang->weeks}",
5876          "21-0-0" => "3 {$lang->weeks}",
5877          "0-1-0" => "1 {$lang->month}",
5878          "0-2-0" => "2 {$lang->months}",
5879          "0-3-0" => "3 {$lang->months}",
5880          "0-4-0" => "4 {$lang->months}",
5881          "0-5-0" => "5 {$lang->months}",
5882          "0-6-0" => "6 {$lang->months}",
5883          "0-0-1" => "1 {$lang->year}",
5884          "0-0-2" => "2 {$lang->years}"
5885      );
5886  
5887      $ban_times = $plugins->run_hooks("functions_fetch_ban_times", $ban_times);
5888  
5889      $ban_times['---'] = $lang->permanent;
5890      return $ban_times;
5891  }
5892  
5893  /**
5894   * Format a ban length in to a UNIX timestamp.
5895   *
5896   * @param string The ban length string
5897   * @param int The optional UNIX timestamp, if 0, current time is used.
5898   * @return int The UNIX timestamp when the ban will be lifted
5899   */
5900  function ban_date2timestamp($date, $stamp=0)
5901  {
5902      if($stamp == 0)
5903      {
5904          $stamp = TIME_NOW;
5905      }
5906      $d = explode('-', $date);
5907      $nowdate = date("H-j-n-Y", $stamp);
5908      $n = explode('-', $nowdate);
5909      $n[1] += $d[0];
5910      $n[2] += $d[1];
5911      $n[3] += $d[2];
5912      return mktime(date("G"), date("i"), 0, $n[2], $n[1], $n[3]);
5913  }
5914  
5915  /**
5916   * Expire old warnings in the database.
5917   *
5918   */
5919  function expire_warnings()
5920  {
5921      global $db;
5922  
5923      $users = array();
5924  
5925      $query = $db->query("
5926          SELECT w.wid, w.uid, w.points, u.warningpoints
5927          FROM ".TABLE_PREFIX."warnings w
5928          LEFT JOIN ".TABLE_PREFIX."users u ON (u.uid=w.uid)
5929          WHERE expires<".TIME_NOW." AND expires!=0 AND expired!=1
5930      ");
5931      while($warning = $db->fetch_array($query))
5932      {
5933          $updated_warning = array(
5934              "expired" => 1
5935          );
5936          $db->update_query("warnings", $updated_warning, "wid='{$warning['wid']}'");
5937  
5938          if(array_key_exists($warning['uid'], $users))
5939          {
5940              $users[$warning['uid']] -= $warning['points'];
5941          }
5942          else
5943          {
5944              $users[$warning['uid']] = $warning['warningpoints']-$warning['points'];
5945          }
5946      }
5947  
5948      foreach($users as $uid => $warningpoints)
5949      {
5950          if($warningpoints < 0)
5951          {
5952              $warningpoints = 0;
5953          }
5954  
5955          $updated_user = array(
5956              "warningpoints" => intval($warningpoints)
5957          );
5958          $db->update_query("users", $updated_user, "uid='".intval($uid)."'");
5959      }
5960  }
5961  
5962  /**
5963   * Custom chmod function to fix problems with hosts who's server configurations screw up umasks
5964   *
5965   * @param string The file to chmod
5966   * @param string The mode to chmod(i.e. 0666)
5967   */
5968  function my_chmod($file, $mode)
5969  {
5970      // Passing $mode as an octal number causes strlen and substr to return incorrect values. Instead pass as a string
5971      if(substr($mode, 0, 1) != '0' || strlen($mode) !== 4)
5972      {
5973          return false;
5974      }
5975      $old_umask = umask(0);
5976  
5977      // We convert the octal string to a decimal number because passing a octal string doesn't work with chmod
5978      // and type casting subsequently removes the prepended 0 which is needed for octal numbers
5979      $result = chmod($file, octdec($mode));
5980      umask($old_umask);
5981      return $result;
5982  }
5983  
5984  /**
5985   * Custom rmdir function to loop through an entire directory and delete all files/folders within
5986   *
5987   * @param string The path to the directory
5988   * @param array Any files you wish to ignore (optional)
5989   */
5990  function my_rmdir_recursive($path, $ignore=array())
5991  {
5992      global $orig_dir;
5993  
5994      if(!isset($orig_dir))
5995      {
5996          $orig_dir = $path;
5997      }
5998  
5999      if(@is_dir($path) && !@is_link($path))
6000      {
6001          if($dh = @opendir($path))
6002          {
6003              while(($file = @readdir($dh)) !== false)
6004              {
6005                  if($file == '.' || $file == '..' || $file == '.svn' || in_array($path.'/'.$file, $ignore) || !my_rmdir_recursive($path.'/'.$file))
6006                  {
6007                      continue;
6008                  }
6009              }
6010             @closedir($dh);
6011          }
6012  
6013          // Are we done? Don't delete the main folder too and return true
6014          if($path == $orig_dir)
6015          {
6016              return true;
6017          }
6018  
6019          return @rmdir($path);
6020      }
6021  
6022      return @unlink($path);
6023  }
6024  
6025  /**
6026   * Counts the number of subforums in a array([pid][disporder][fid]) starting from the pid
6027   *
6028   * @param array The array of forums
6029   * @return integer The number of sub forums
6030   */
6031  function subforums_count($array)
6032  {
6033      $count = 0;
6034      foreach($array as $array2)
6035      {
6036          $count += count($array2);
6037      }
6038  
6039      return $count;
6040  }
6041  
6042  /**
6043   * Fix for PHP's ip2long to guarantee a 32-bit signed integer value is produced (this is aimed
6044   * at 64-bit versions of PHP)
6045   *
6046   * @param string The IP to convert
6047   * @return integer IP in 32-bit signed format
6048   */
6049  function my_ip2long($ip)
6050  {
6051      $ip_long = ip2long($ip);
6052  
6053      if(!$ip_long)
6054      {
6055          $ip_long = sprintf("%u", ip2long($ip));
6056  
6057          if(!$ip_long)
6058          {
6059              return 0;
6060          }
6061      }
6062  
6063      if($ip_long >= 2147483648) // Won't occur on 32-bit PHP
6064      {
6065          $ip_long -= 4294967296;
6066      }
6067  
6068      return $ip_long;
6069  }
6070  
6071  /**
6072   * As above, fix for PHP's long2ip on 64-bit versions
6073   *
6074   * @param integer The IP to convert (will accept 64-bit IPs as well)
6075   * @return string IP in IPv4 format
6076   */
6077  function my_long2ip($long)
6078  {
6079      // On 64-bit machines is_int will return true. On 32-bit it will return false
6080      if($long < 0 && is_int(2147483648))
6081      {
6082          // We have a 64-bit system
6083          $long += 4294967296;
6084      }
6085      return long2ip($long);
6086  }
6087  
6088  
6089  /**
6090   * Processes a checksum list on MyBB files and returns a result set
6091   *
6092   * @param array The array of checksums and their corresponding files
6093   * @return array The bad files
6094   */
6095  function verify_files($path=MYBB_ROOT, $count=0)
6096  {
6097      global $mybb, $checksums, $bad_verify_files;
6098  
6099      // We don't need to check these types of files
6100      $ignore = array(".", "..", ".svn", "config.php", "settings.php", "Thumb.db", "config.default.php", "lock", "htaccess.txt", "logo.gif");
6101      $ignore_ext = array("attach");
6102  
6103      if(substr($path, -1, 1) == "/")
6104      {
6105          $path = substr($path, 0, -1);
6106      }
6107  
6108      if(!is_array($bad_verify_files))
6109      {
6110          $bad_verify_files = array();
6111      }
6112  
6113      // Make sure that we're in a directory and it's not a symbolic link
6114      if(@is_dir($path) && !@is_link($path))
6115      {
6116          if($dh = @opendir($path))
6117          {
6118              // Loop through all the files/directories in this directory
6119              while(($file = @readdir($dh)) !== false)
6120              {
6121                  if(in_array($file, $ignore) || in_array(get_extension($file), $ignore_ext))
6122                  {
6123                      continue;
6124                  }
6125  
6126                  // Recurse through the directory tree
6127                  if(is_dir($path."/".$file))
6128                  {
6129                      verify_files($path."/".$file, ($count+1));
6130                      continue;
6131                  }
6132  
6133                  // We only need the last part of the path (from the MyBB directory to the file. i.e. inc/functions.php)
6134                  $file_path = ".".str_replace(substr(MYBB_ROOT, 0, -1), "", $path)."/".$file;
6135  
6136                  // Does this file even exist in our official list? Perhaps it's a plugin
6137                  if(array_key_exists($file_path, $checksums))
6138                  {
6139                      $filename = $path."/".$file;
6140                      $handle = fopen($filename, "rb");
6141                      $contents = '';
6142                      while(!feof($handle))
6143                      {
6144                          $contents .= fread($handle, 8192);
6145                      }
6146                      fclose($handle);
6147  
6148                      $md5 = md5($contents);
6149  
6150                      // Does it match any of our hashes (unix/windows new lines taken into consideration with the hashes)
6151                      if(!in_array($md5, $checksums[$file_path]))
6152                      {
6153                          $bad_verify_files[] = array("status" => "changed", "path" => $file_path);
6154                      }
6155                  }
6156                  unset($checksums[$file_path]);
6157              }
6158             @closedir($dh);
6159          }
6160      }
6161  
6162      if($count == 0)
6163      {
6164          if(!empty($checksums))
6165          {
6166              foreach($checksums as $file_path => $hashes)
6167              {
6168                  if(in_array(basename($file_path), $ignore))
6169                  {
6170                      continue;
6171                  }
6172                  $bad_verify_files[] = array("status" => "missing", "path" => $file_path);
6173              }
6174          }
6175      }
6176  
6177      // uh oh
6178      if($count == 0)
6179      {
6180          return $bad_verify_files;
6181      }
6182  }
6183  
6184  /**
6185   * Returns a signed value equal to an integer
6186   *
6187   * @param int The integer
6188   * @return string The signed equivalent
6189   */
6190  function signed($int)
6191  {
6192      if($int < 0)
6193      {
6194          return "$int";
6195      }
6196      else
6197      {
6198          return "+$int";
6199      }
6200  }
6201  
6202  /**
6203   * Returns a securely generated seed for PHP's RNG (Random Number Generator)
6204   *
6205   * @param int Length of the seed bytes (8 is default. Provides good cryptographic variance)
6206   * @return int An integer equivalent of a secure hexadecimal seed
6207   */
6208  function secure_seed_rng($count=8)
6209  {
6210      $output = '';
6211  
6212      // Try the unix/linux method
6213      if(@is_readable('/dev/urandom') && ($handle = @fopen('/dev/urandom', 'rb')))
6214      {
6215          $output = @fread($handle, $count);
6216          @fclose($handle);
6217      }
6218  
6219      // Didn't work? Do we still not have enough bytes? Use our own (less secure) rng generator
6220      if(strlen($output) < $count)
6221      {
6222          $output = '';
6223  
6224          // Close to what PHP basically uses internally to seed, but not quite.
6225          $unique_state = microtime().@getmypid();
6226  
6227          for($i = 0; $i < $count; $i += 16)
6228          {
6229              $unique_state = md5(microtime().$unique_state);
6230              $output .= pack('H*', md5($unique_state));
6231          }
6232      }
6233  
6234      // /dev/urandom and openssl will always be twice as long as $count. base64_encode will roughly take up 33% more space but crc32 will put it to 32 characters
6235      $output = hexdec(substr(dechex(crc32(base64_encode($output))), 0, $count));
6236  
6237      return $output;
6238  }
6239  
6240  /**
6241   * Wrapper function for mt_rand. Automatically seeds using a secure seed once.
6242   *
6243   * @param int Optional lowest value to be returned (default: 0)
6244   * @param int Optional highest value to be returned (default: mt_getrandmax())
6245   * @param boolean True forces it to reseed the RNG first
6246   * @return int An integer equivalent of a secure hexadecimal seed
6247   */
6248  function my_rand($min=null, $max=null, $force_seed=false)
6249  {
6250      static $seeded = false;
6251      static $obfuscator = 0;
6252  
6253      if($seeded == false || $force_seed == true)
6254      {
6255          mt_srand(secure_seed_rng());
6256          $seeded = true;
6257  
6258          $obfuscator = abs((int) secure_seed_rng());
6259  
6260          // Ensure that $obfuscator is <= mt_getrandmax() for 64 bit systems.
6261          if($obfuscator > mt_getrandmax())
6262          {
6263              $obfuscator -= mt_getrandmax();
6264          }
6265      }
6266  
6267      if($min !== null && $max !== null)
6268      {
6269          $distance = $max - $min;
6270          if ($distance > 0)
6271          {
6272              return $min + (int)((float)($distance + 1) * (float)(mt_rand() ^ $obfuscator) / (mt_getrandmax() + 1));
6273          }
6274          else
6275          {
6276              return mt_rand($min, $max);
6277          }
6278      }
6279      else
6280      {
6281          $val = mt_rand() ^ $obfuscator;
6282          return $val;
6283      }
6284  }
6285  
6286  /**
6287   * More robust version of PHP's trim() function. It includes a list of UTF-16 blank characters
6288   * from http://kb.mozillazine.org/Network.IDN.blacklist_chars
6289   *
6290   * @param string The string to trim from
6291   * @param string Optional. The stripped characters can also be specified using the charlist parameter
6292   * @return string The trimmed string
6293   */
6294  function trim_blank_chrs($string, $charlist=false)
6295  {
6296      $hex_chrs = array(
6297          0x20 => 1,
6298          0x09 => 1,
6299          0x0A => 1,
6300          0x0D => 1,
6301          0x0B => 1,
6302          0xAD => 1,
6303          0xA0 => 1,
6304          0xAD => 1,
6305          0xBF => 1,
6306          0x81 => 1,
6307          0x8D => 1,
6308          0x90 => 1,
6309          0x9D => 1,
6310          0xCC => array(0xB7 => 1, 0xB8 => 1), // \x{0337} or \x{0338}
6311          0xE1 => array(0x85 => array(0x9F => 1, 0xA0 => 1)), // \x{115F} or \x{1160}
6312          0xE2 => array(0x80 => array(0x80 => 1, 0x81 => 1, 0x82 => 1, 0x83 => 1, 0x84 => 1, 0x85 => 1, 0x86 => 1, 0x87 => 1, 0x88 => 1, 0x89 => 1, 0x8A => 1, 0x8B => 1, // \x{2000} to \x{200B}
6313                                      0xA8 => 1, 0xA9 => 1, 0xAA => 1, 0xAB => 1, 0xAC => 1, 0xAD => 1, 0xAE => 1, 0xAF => 1), // \x{2028} to \x{202F}
6314                        0x81 => array(0x9F => 1)), // \x{205F}
6315          0xE3 => array(0x80 => array(0x80 => 1), // \x{3000}
6316                        0x85 => array(0xA4 => 1)), // \x{3164}
6317          0xEF => array(0xBB => array(0xBF => 1), // \x{FEFF}
6318                        0xBE => array(0xA0 => 1), // \x{FFA0}
6319                        0xBF => array(0xB9 => 1, 0xBA => 1, 0xBB => 1)), // \x{FFF9} to \x{FFFB}
6320      );
6321  
6322      $hex_chrs_rev = array(
6323          0x20 => 1,
6324          0x09 => 1,
6325          0x0A => 1,
6326          0x0D => 1,
6327          0x0B => 1,
6328          0xA0 => array(0xC2 => 1),
6329          0xAD => array(0xC2 => 1),
6330          0xBF => array(0xC2 => 1),
6331          0x81 => array(0xC2 => 1),
6332          0x8D => array(0xC2 => 1),
6333          0x90 => array(0xC2 => 1),
6334          0x9D => array(0xC2 => 1),
6335          0xB8 => array(0xCC => 1), // \x{0338}
6336          0xB7 => array(0xCC => 1), // \x{0337}
6337          0xA0 => array(0x85 => array(0xE1 => 1)), // \x{1160}
6338          0x9F => array(0x85 => array(0xE1 => 1), // \x{115F}
6339                        0x81 => array(0xE2 => 1)), // \x{205F}
6340          0x80 => array(0x80 => array(0xE3 => 1, 0xE2 => 1)), // \x{3000}, \x{2000}
6341          0x81 => array(0x80 => array(0xE2 => 1)), // \x{2001}
6342          0x82 => array(0x80 => array(0xE2 => 1)), // \x{2002}
6343          0x83 => array(0x80 => array(0xE2 => 1)), // \x{2003}
6344          0x84 => array(0x80 => array(0xE2 => 1)), // \x{2004}
6345          0x85 => array(0x80 => array(0xE2 => 1)), // \x{2005}
6346          0x86 => array(0x80 => array(0xE2 => 1)), // \x{2006}
6347          0x87 => array(0x80 => array(0xE2 => 1)), // \x{2007}
6348          0x88 => array(0x80 => array(0xE2 => 1)), // \x{2008}
6349          0x89 => array(0x80 => array(0xE2 => 1)), // \x{2009}
6350          0x8A => array(0x80 => array(0xE2 => 1)), // \x{200A}
6351          0x8B => array(0x80 => array(0xE2 => 1)), // \x{200B}
6352          0xA8 => array(0x80 => array(0xE2 => 1)), // \x{2028}
6353          0xA9 => array(0x80 => array(0xE2 => 1)), // \x{2029}
6354          0xAA => array(0x80 => array(0xE2 => 1)), // \x{202A}
6355          0xAB => array(0x80 => array(0xE2 => 1)), // \x{202B}
6356          0xAC => array(0x80 => array(0xE2 => 1)), // \x{202C}
6357          0xAD => array(0x80 => array(0xE2 => 1)), // \x{202D}
6358          0xAE => array(0x80 => array(0xE2 => 1)), // \x{202E}
6359          0xAF => array(0x80 => array(0xE2 => 1)), // \x{202F}
6360          0xA4 => array(0x85 => array(0xE3 => 1)), // \x{3164}
6361          0xBF => array(0xBB => array(0xEF => 1)), // \x{FEFF}
6362          0xA0 => array(0xBE => array(0xEF => 1)), // \x{FFA0}
6363          0xB9 => array(0xBF => array(0xEF => 1)), // \x{FFF9}
6364          0xBA => array(0xBF => array(0xEF => 1)), // \x{FFFA}
6365          0xBB => array(0xBF => array(0xEF => 1)), // \x{FFFB}
6366      );
6367  
6368      // Start from the beginning and work our way in
6369      do
6370      {
6371          // Check to see if we have matched a first character in our utf-16 array
6372          $offset = match_sequence($string, $hex_chrs);
6373          if(!$offset)
6374          {
6375              // If not, then we must have a "good" character and we don't need to do anymore processing
6376              break;
6377          }
6378          $string = substr($string, $offset);
6379      }
6380      while(++$i);
6381  
6382      // Start from the end and work our way in
6383      $string = strrev($string);
6384      do
6385      {
6386          // Check to see if we have matched a first character in our utf-16 array
6387          $offset = match_sequence($string, $hex_chrs_rev);
6388          if(!$offset)
6389          {
6390              // If not, then we must have a "good" character and we don't need to do anymore processing
6391              break;
6392          }
6393          $string = substr($string, $offset);
6394      }
6395      while(++$i);
6396      $string = strrev($string);
6397  
6398      if($charlist !== false)
6399      {
6400          $string = trim($string, $charlist);
6401      }
6402      else
6403      {
6404          $string = trim($string);
6405      }
6406  
6407      return $string;
6408  }
6409  
6410  function match_sequence($string, $array, $i=0, $n=0)
6411  {
6412      if($string === "")
6413      {
6414          return 0;
6415      }
6416  
6417      $ord = ord($string[$i]);
6418      if(array_key_exists($ord, $array))
6419      {
6420          $level = $array[$ord];
6421          ++$n;
6422          if(is_array($level))
6423          {
6424              ++$i;
6425              return match_sequence($string, $level, $i, $n);
6426          }
6427          return $n;
6428      }
6429  
6430      return 0;
6431  }
6432  
6433  /**
6434   * Obtain the version of GD installed.
6435   *
6436   * @return float Version of GD
6437   */
6438  function gd_version()
6439  {
6440      static $gd_version;
6441  
6442      if($gd_version)
6443      {
6444          return $gd_version;
6445      }
6446      if(!extension_loaded('gd'))
6447      {
6448          return;
6449      }
6450  
6451      if(function_exists("gd_info"))
6452      {
6453          $gd_info = gd_info();
6454          preg_match('/\d/', $gd_info['GD Version'], $gd);
6455          $gd_version = $gd[0];
6456      }
6457      else
6458      {
6459          ob_start();
6460          phpinfo(8);
6461          $info = ob_get_contents();
6462          ob_end_clean();
6463          $info = stristr($info, 'gd version');
6464          preg_match('/\d/', $info, $gd);
6465          $gd_version = $gd[0];
6466      }
6467  
6468      return $gd_version;
6469  }
6470  
6471  /**
6472   * Handles 4 byte UTF-8 characters.
6473   *
6474   * This can be used to either reject strings which contain 4 byte UTF-8
6475   * characters, or replace them with question marks. This is limited to UTF-8
6476   * collated databases using MySQL.
6477   *
6478   * Original: http://www.avidheap.org/2013/a-quick-way-to-normalize-a-utf8-string-when-your-mysql-database-is-not-utf8mb4
6479   *
6480   * @param string The string to be checked.
6481   * @param bool If false don't return the string, only the boolean result.
6482   * @return mixed Return a string if the second parameter is true, boolean otherwise.
6483   */
6484  function utf8_handle_4byte_string($input, $return=true)
6485  {
6486      global $config;
6487  
6488      if($config['database']['type'] != 'mysql' && $config['database']['type'] != 'mysqli')
6489      {
6490          if($return == true)
6491          {
6492              return $input;
6493          }
6494          return true;
6495      }
6496  
6497      $contains_4bytes = false;
6498      if(!empty($input))
6499      {
6500          $utf8_2byte = 0xC0 /*1100 0000*/;
6501          $utf8_2byte_bmask = 0xE0 /*1110 0000*/;
6502  
6503          $utf8_3byte = 0xE0 /*1110 0000*/;
6504          $utf8_3byte_bmask = 0XF0 /*1111 0000*/;
6505  
6506          $utf8_4byte = 0xF0 /*1111 0000*/;
6507          $utf8_4byte_bmask = 0xF8 /*1111 1000*/;
6508  
6509          $sanitized = "";
6510          $len = strlen($input);
6511          for($i = 0; $i < $len; ++$i)
6512          {
6513              $mb_char = $input[$i]; // Potentially a multibyte sequence
6514              $byte = ord($mb_char);
6515              if(($byte & $utf8_2byte_bmask) == $utf8_2byte)
6516              {
6517                  $mb_char .= $input[++$i];
6518              }
6519              elseif(($byte & $utf8_3byte_bmask) == $utf8_3byte)
6520              {
6521                  $mb_char .= $input[++$i];
6522                  $mb_char .= $input[++$i];
6523              }
6524              elseif(($byte & $utf8_4byte_bmask) == $utf8_4byte)
6525              {
6526                  $contains_4bytes = true;
6527                  // Replace with ? to avoid MySQL exception
6528                  $mb_char = '?';
6529                  $i += 3;
6530              }
6531  
6532              $sanitized .=  $mb_char;
6533  
6534              if($contains_4bytes == true && $return == false)
6535              {
6536                  return false;
6537              }
6538          }
6539  
6540          $input = $sanitized;
6541      }
6542  
6543      if($contains_4bytes == false && $return == false)
6544      {
6545          return true;
6546      }
6547      return $input;
6548  }
6549  ?>