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/inc/ -> functions_user.php (source)

   1  <?php
   2  /**
   3   * MyBB 1.8
   4   * Copyright 2014 MyBB Group, All Rights Reserved
   5   *
   6   * Website: http://www.mybb.com
   7   * License: http://www.mybb.com/about/license
   8   *
   9   */
  10  
  11  /**
  12   * Checks if a user with uid $uid exists in the database.
  13   *
  14   * @param int $uid The uid to check for.
  15   * @return boolean True when exists, false when not.
  16   */
  17  function user_exists($uid)
  18  {
  19      global $db;
  20  
  21      $query = $db->simple_select("users", "COUNT(*) as user", "uid='".(int)$uid."'", array('limit' => 1));
  22      if($db->fetch_field($query, 'user') == 1)
  23      {
  24          return true;
  25      }
  26      else
  27      {
  28          return false;
  29      }
  30  }
  31  
  32  /**
  33   * Checks if $username already exists in the database.
  34   *
  35   * @param string $username The username for check for.
  36   * @return boolean True when exists, false when not.
  37   */
  38  function username_exists($username)
  39  {
  40      $options = array(
  41          'username_method' => 2
  42      );
  43  
  44      return (bool)get_user_by_username($username, $options);
  45  }
  46  
  47  /**
  48   * Checks a password with a supplied username.
  49   *
  50   * @param string $username The username of the user.
  51   * @param string $password The plain-text password.
  52   * @return boolean|array False when no match, array with user info when match.
  53   */
  54  function validate_password_from_username($username, $password)
  55  {
  56      global $mybb;
  57  
  58      $options = array(
  59          'fields' => '*',
  60          'username_method' => $mybb->settings['username_method'],
  61      );
  62  
  63      $user = get_user_by_username($username, $options);
  64  
  65      if(!$user['uid'])
  66      {
  67          return false;
  68      }
  69  
  70      return validate_password_from_uid($user['uid'], $password, $user);
  71  }
  72  
  73  /**
  74   * Checks a password with a supplied uid.
  75   *
  76   * @param int $uid The user id.
  77   * @param string $password The plain-text password.
  78   * @param array $user An optional user data array.
  79   * @return boolean|array False when not valid, user data array when valid.
  80   */
  81  function validate_password_from_uid($uid, $password, $user = array())
  82  {
  83      global $db, $mybb;
  84      if(isset($mybb->user['uid']) && $mybb->user['uid'] == $uid)
  85      {
  86          $user = $mybb->user;
  87      }
  88      if(!$user['password'])
  89      {
  90          $user = get_user($uid);
  91      }
  92      if(!$user['salt'])
  93      {
  94          // Generate a salt for this user and assume the password stored in db is a plain md5 password
  95          $password_fields = create_password($user['password'], false, $user);
  96          $db->update_query("users", $password_fields, "uid='".$user['uid']."'");
  97      }
  98  
  99      if(!$user['loginkey'])
 100      {
 101          $user['loginkey'] = generate_loginkey();
 102          $sql_array = array(
 103              "loginkey" => $user['loginkey']
 104          );
 105          $db->update_query("users", $sql_array, "uid = ".$user['uid']);
 106      }
 107      if(verify_user_password($user, $password))
 108      {
 109          return $user;
 110      }
 111      else
 112      {
 113          return false;
 114      }
 115  }
 116  
 117  /**
 118   * Updates a user's password.
 119   *
 120   * @param int $uid The user's id.
 121   * @param string $password The md5()'ed password.
 122   * @param string $salt (Optional) The salt of the user.
 123   * @return array The new password.
 124   * @deprecated deprecated since version 1.8.6 Please use other alternatives.
 125   */
 126  function update_password($uid, $password, $salt="")
 127  {
 128      global $db, $plugins;
 129  
 130      $newpassword = array();
 131  
 132      // If no salt was specified, check in database first, if still doesn't exist, create one
 133      if(!$salt)
 134      {
 135          $query = $db->simple_select("users", "salt", "uid='$uid'");
 136          $user = $db->fetch_array($query);
 137          if($user['salt'])
 138          {
 139              $salt = $user['salt'];
 140          }
 141          else
 142          {
 143              $salt = generate_salt();
 144          }
 145          $newpassword['salt'] = $salt;
 146      }
 147  
 148      // Create new password based on salt
 149      $saltedpw = salt_password($password, $salt);
 150  
 151      // Generate new login key
 152      $loginkey = generate_loginkey();
 153  
 154      // Update password and login key in database
 155      $newpassword['password'] = $saltedpw;
 156      $newpassword['loginkey'] = $loginkey;
 157      $db->update_query("users", $newpassword, "uid='$uid'");
 158  
 159      $plugins->run_hooks("password_changed");
 160  
 161      return $newpassword;
 162  }
 163  
 164  /**
 165   * Salts a password based on a supplied salt.
 166   *
 167   * @param string $password The md5()'ed password.
 168   * @param string $salt The salt.
 169   * @return string The password hash.
 170   * @deprecated deprecated since version 1.8.9 Please use other alternatives.
 171   */
 172  function salt_password($password, $salt)
 173  {
 174      return md5(md5($salt).$password);
 175  }
 176  
 177  /**
 178   * Salts a password based on a supplied salt.
 179   *
 180   * @param string $password The input password.
 181   * @param string $salt (Optional) The salt used by the MyBB algorithm.
 182   * @param string $user (Optional) An array containing password-related data.
 183   * @return array Password-related fields.
 184   */
 185  function create_password($password, $salt = false, $user = false)
 186  {
 187      global $plugins;
 188  
 189      $fields = null;
 190  
 191      $parameters = compact('password', 'salt', 'user', 'fields');
 192  
 193      if(!defined('IN_INSTALL') && !defined('IN_UPGRADE'))
 194      {
 195          $plugins->run_hooks('create_password', $parameters);
 196      }
 197  
 198      if(!is_null($parameters['fields']))
 199      {
 200          $fields = $parameters['fields'];
 201      }
 202      else
 203      {
 204          if(!$salt)
 205          {
 206              $salt = generate_salt();
 207          }
 208  
 209          $hash = md5(md5($salt).md5($password));
 210  
 211          $fields = array(
 212              'salt' => $salt,
 213              'password' => $hash,
 214          );
 215      }
 216  
 217      return $fields;
 218  }
 219  
 220  /**
 221   * Compares user's password data against provided input.
 222   *
 223   * @param array $user An array containing password-related data.
 224   * @param string $password The plain-text input password.
 225   * @return bool Result of the comparison.
 226   */
 227  function verify_user_password($user, $password)
 228  {
 229      global $plugins;
 230  
 231      $result = null;
 232  
 233      $parameters = compact('user', 'password', 'result');
 234  
 235      if(!defined('IN_INSTALL') && !defined('IN_UPGRADE'))
 236      {
 237          $plugins->run_hooks('verify_user_password', $parameters);
 238      }
 239  
 240      if(!is_null($parameters['result']))
 241      {
 242          return $parameters['result'];
 243      }
 244      else
 245      {
 246          $password_fields = create_password($password, $user['salt'], $user);
 247  
 248          return my_hash_equals($user['password'], $password_fields['password']);
 249      }
 250  }
 251  
 252  /**
 253   * Generates a random salt
 254   *
 255   * @return string The salt.
 256   */
 257  function generate_salt()
 258  {
 259      return random_str(8);
 260  }
 261  
 262  /**
 263   * Generates a 50 character random login key.
 264   *
 265   * @return string The login key.
 266   */
 267  function generate_loginkey()
 268  {
 269      return random_str(50);
 270  }
 271  
 272  /**
 273   * Updates a user's salt in the database (does not update a password).
 274   *
 275   * @param int $uid The uid of the user to update.
 276   * @return string The new salt.
 277   */
 278  function update_salt($uid)
 279  {
 280      global $db;
 281  
 282      $salt = generate_salt();
 283      $sql_array = array(
 284          "salt" => $salt
 285      );
 286      $db->update_query("users", $sql_array, "uid='{$uid}'");
 287  
 288      return $salt;
 289  }
 290  
 291  /**
 292   * Generates a new login key for a user.
 293   *
 294   * @param int $uid The uid of the user to update.
 295   * @return string The new login key.
 296   */
 297  function update_loginkey($uid)
 298  {
 299      global $db;
 300  
 301      $loginkey = generate_loginkey();
 302      $sql_array = array(
 303          "loginkey" => $loginkey
 304      );
 305      $db->update_query("users", $sql_array, "uid='{$uid}'");
 306  
 307      return $loginkey;
 308  
 309  }
 310  
 311  /**
 312   * Adds a thread to a user's thread subscription list.
 313   * If no uid is supplied, the currently logged in user's id will be used.
 314   *
 315   * @param int $tid The tid of the thread to add to the list.
 316   * @param int $notification (Optional) The type of notification to receive for replies (0=none, 1=email, 2=pm)
 317   * @param int $uid (Optional) The uid of the user who's list to update.
 318   * @return boolean True when success, false when otherwise.
 319   */
 320  function add_subscribed_thread($tid, $notification=1, $uid=0)
 321  {
 322      global $mybb, $db;
 323  
 324      if(!$uid)
 325      {
 326          $uid = $mybb->user['uid'];
 327      }
 328  
 329      if(!$uid)
 330      {
 331          return false;
 332      }
 333  
 334      $query = $db->simple_select("threadsubscriptions", "*", "tid='".(int)$tid."' AND uid='".(int)$uid."'");
 335      $subscription = $db->fetch_array($query);
 336      if(empty($subscription) || !$subscription['tid'])
 337      {
 338          $insert_array = array(
 339              'uid' => (int)$uid,
 340              'tid' => (int)$tid,
 341              'notification' => (int)$notification,
 342              'dateline' => TIME_NOW
 343          );
 344          $db->insert_query("threadsubscriptions", $insert_array);
 345      }
 346      else
 347      {
 348          // Subscription exists - simply update notification
 349          $update_array = array(
 350              "notification" => (int)$notification
 351          );
 352          $db->update_query("threadsubscriptions", $update_array, "uid='{$uid}' AND tid='{$tid}'");
 353      }
 354      return true;
 355  }
 356  
 357  /**
 358   * Remove a thread from a user's thread subscription list.
 359   * If no uid is supplied, the currently logged in user's id will be used.
 360   *
 361   * @param int $tid The tid of the thread to remove from the list.
 362   * @param int $uid (Optional) The uid of the user who's list to update.
 363   * @return boolean True when success, false when otherwise.
 364   */
 365  function remove_subscribed_thread($tid, $uid=0)
 366  {
 367      global $mybb, $db;
 368  
 369      if(!$uid)
 370      {
 371          $uid = $mybb->user['uid'];
 372      }
 373  
 374      if(!$uid)
 375      {
 376          return false;
 377      }
 378      $db->delete_query("threadsubscriptions", "tid='".$tid."' AND uid='{$uid}'");
 379  
 380      return true;
 381  }
 382  
 383  /**
 384   * Adds a forum to a user's forum subscription list.
 385   * If no uid is supplied, the currently logged in user's id will be used.
 386   *
 387   * @param int $fid The fid of the forum to add to the list.
 388   * @param int $uid (Optional) The uid of the user who's list to update.
 389   * @return boolean True when success, false when otherwise.
 390   */
 391  function add_subscribed_forum($fid, $uid=0)
 392  {
 393      global $mybb, $db;
 394  
 395      if(!$uid)
 396      {
 397          $uid = $mybb->user['uid'];
 398      }
 399  
 400      if(!$uid)
 401      {
 402          return false;
 403      }
 404  
 405      $fid = (int)$fid;
 406      $uid = (int)$uid;
 407  
 408      $query = $db->simple_select("forumsubscriptions", "*", "fid='".$fid."' AND uid='{$uid}'", array('limit' => 1));
 409      $fsubscription = $db->fetch_array($query);
 410      if(empty($fsubscription) || !$fsubscription['fid'])
 411      {
 412          $insert_array = array(
 413              'fid' => $fid,
 414              'uid' => $uid
 415          );
 416          $db->insert_query("forumsubscriptions", $insert_array);
 417      }
 418  
 419      return true;
 420  }
 421  
 422  /**
 423   * Removes a forum from a user's forum subscription list.
 424   * If no uid is supplied, the currently logged in user's id will be used.
 425   *
 426   * @param int $fid The fid of the forum to remove from the list.
 427   * @param int $uid (Optional) The uid of the user who's list to update.
 428   * @return boolean True when success, false when otherwise.
 429   */
 430  function remove_subscribed_forum($fid, $uid=0)
 431  {
 432      global $mybb, $db;
 433  
 434      if(!$uid)
 435      {
 436          $uid = $mybb->user['uid'];
 437      }
 438  
 439      if(!$uid)
 440      {
 441          return false;
 442      }
 443      $db->delete_query("forumsubscriptions", "fid='".$fid."' AND uid='{$uid}'");
 444  
 445      return true;
 446  }
 447  
 448  /**
 449   * Constructs the usercp navigation menu.
 450   *
 451   */
 452  function usercp_menu()
 453  {
 454      global $mybb, $templates, $theme, $plugins, $lang, $usercpnav, $usercpmenu;
 455  
 456      $lang->load("usercpnav");
 457  
 458      // Add the default items as plugins with separated priorities of 10
 459      if($mybb->settings['enablepms'] != 0 && $mybb->usergroup['canusepms'] == 1)
 460      {
 461          $plugins->add_hook("usercp_menu", "usercp_menu_messenger", 10);
 462      }
 463  
 464      if($mybb->usergroup['canusercp'] == 1)
 465      {
 466          $plugins->add_hook("usercp_menu", "usercp_menu_profile", 20);
 467          $plugins->add_hook("usercp_menu", "usercp_menu_misc", 30);
 468      }
 469  
 470      // Run the plugin hooks
 471      $plugins->run_hooks("usercp_menu");
 472      global $usercpmenu;
 473  
 474      if($mybb->usergroup['canusercp'] == 1)
 475      {
 476          eval("\$ucp_nav_home = \"".$templates->get("usercp_nav_home")."\";");
 477      }
 478  
 479      eval("\$usercpnav = \"".$templates->get("usercp_nav")."\";");
 480  
 481      $plugins->run_hooks("usercp_menu_built");
 482  }
 483  
 484  /**
 485   * Constructs the usercp messenger menu.
 486   *
 487   */
 488  function usercp_menu_messenger()
 489  {
 490      global $db, $mybb, $templates, $theme, $usercpmenu, $lang, $collapse, $collapsed, $collapsedimg;
 491  
 492      $expaltext = (in_array("usercppms", $collapse)) ? $lang->expcol_expand : $lang->expcol_collapse;
 493      $usercp_nav_messenger = $templates->get("usercp_nav_messenger");
 494      // Hide tracking link if no permission
 495      $tracking = '';
 496      if($mybb->usergroup['cantrackpms'])
 497      {
 498          $tracking = $templates->get("usercp_nav_messenger_tracking");
 499      }
 500      eval("\$ucp_nav_tracking = \"". $tracking ."\";");
 501  
 502      // Hide compose link if no permission
 503      $ucp_nav_compose = '';
 504      if($mybb->usergroup['cansendpms'] == 1)
 505      {
 506          eval("\$ucp_nav_compose = \"".$templates->get("usercp_nav_messenger_compose")."\";");
 507      }
 508  
 509      $folderlinks = $folder_id = $folder_name = '';
 510      $foldersexploded = explode("$%%$", $mybb->user['pmfolders']);
 511      foreach($foldersexploded as $key => $folders)
 512      {
 513          $folderinfo = explode("**", $folders, 2);
 514          $folderinfo[1] = get_pm_folder_name($folderinfo[0], $folderinfo[1]);
 515          if($folderinfo[0] == 4)
 516          {
 517              $class = "usercp_nav_trash_pmfolder";
 518          }
 519          else if($folderlinks)
 520          {
 521              $class = "usercp_nav_sub_pmfolder";
 522          }
 523          else
 524          {
 525              $class = "usercp_nav_pmfolder";
 526          }
 527  
 528          $folder_id = $folderinfo[0];
 529          $folder_name = $folderinfo[1];
 530  
 531          eval("\$folderlinks .= \"".$templates->get("usercp_nav_messenger_folder")."\";");
 532      }
 533  
 534      if(!isset($collapsedimg['usercppms']))
 535      {
 536          $collapsedimg['usercppms'] = '';
 537      }
 538  
 539      if(!isset($collapsed['usercppms_e']))
 540      {
 541          $collapsed['usercppms_e'] = '';
 542      }
 543  
 544      eval("\$usercpmenu .= \"".$usercp_nav_messenger."\";");
 545  }
 546  
 547  /**
 548   * Constructs the usercp profile menu.
 549   *
 550   */
 551  function usercp_menu_profile()
 552  {
 553      global $db, $mybb, $templates, $theme, $usercpmenu, $lang, $collapse, $collapsed, $collapsedimg;
 554  
 555      $changenameop = '';
 556      if($mybb->usergroup['canchangename'] != 0)
 557      {
 558          eval("\$changenameop = \"".$templates->get("usercp_nav_changename")."\";");
 559      }
 560  
 561      $changesigop = '';
 562      if($mybb->usergroup['canusesig'] == 1 && ($mybb->usergroup['canusesigxposts'] == 0 || $mybb->usergroup['canusesigxposts'] > 0 && $mybb->user['postnum'] > $mybb->usergroup['canusesigxposts']))
 563      {
 564          if($mybb->user['suspendsignature'] == 0 || $mybb->user['suspendsignature'] == 1 && $mybb->user['suspendsigtime'] > 0 && $mybb->user['suspendsigtime'] < TIME_NOW)
 565          {
 566              eval("\$changesigop = \"".$templates->get("usercp_nav_editsignature")."\";");
 567          }
 568      }
 569  
 570      if(!isset($collapsedimg['usercpprofile']))
 571      {
 572          $collapsedimg['usercpprofile'] = '';
 573      }
 574  
 575      if(!isset($collapsed['usercpprofile_e']))
 576      {
 577          $collapsed['usercpprofile_e'] = '';
 578      }
 579  
 580      $expaltext = (in_array("usercpprofile", $collapse)) ? $lang->expcol_expand : $lang->expcol_collapse;
 581      eval("\$usercpmenu .= \"".$templates->get("usercp_nav_profile")."\";");
 582  }
 583  
 584  /**
 585   * Constructs the usercp misc menu.
 586   *
 587   */
 588  function usercp_menu_misc()
 589  {
 590      global $db, $mybb, $templates, $theme, $usercpmenu, $lang, $collapse, $collapsed, $collapsedimg;
 591  
 592      $draftstart = $draftend = '';
 593      $draftcount = $lang->ucp_nav_drafts;
 594  
 595      $query = $db->simple_select("posts", "COUNT(pid) AS draftcount", "visible = '-2' AND uid = '{$mybb->user['uid']}'");
 596      $count = $db->fetch_field($query, 'draftcount');
 597  
 598      if($count > 0)
 599      {
 600          $draftcount = $lang->sprintf($lang->ucp_nav_drafts_active, my_number_format($count));
 601      }
 602  
 603      if($mybb->settings['enableattachments'] != 0)
 604      {
 605          eval("\$attachmentop = \"".$templates->get("usercp_nav_attachments")."\";");
 606      }
 607  
 608      if(!isset($collapsedimg['usercpmisc']))
 609      {
 610          $collapsedimg['usercpmisc'] = '';
 611      }
 612  
 613      if(!isset($collapsed['usercpmisc_e']))
 614      {
 615          $collapsed['usercpmisc_e'] = '';
 616      }
 617  
 618      $profile_link = get_profile_link($mybb->user['uid']);
 619      $expaltext = (in_array("usercpmisc", $collapse)) ? $lang->expcol_expand : $lang->expcol_collapse;
 620      eval("\$usercpmenu .= \"".$templates->get("usercp_nav_misc")."\";");
 621  }
 622  
 623  /**
 624   * Gets the usertitle for a specific uid.
 625   *
 626   * @param int $uid The uid of the user to get the usertitle of.
 627   * @return string The usertitle of the user.
 628   */
 629  function get_usertitle($uid=0)
 630  {
 631      global $db, $mybb;
 632  
 633      if($mybb->user['uid'] == $uid)
 634      {
 635          $user = $mybb->user;
 636      }
 637      else
 638      {
 639          $query = $db->simple_select("users", "usertitle,postnum", "uid='$uid'", array('limit' => 1));
 640          $user = $db->fetch_array($query);
 641      }
 642  
 643      if($user['usertitle'])
 644      {
 645          return $user['usertitle'];
 646      }
 647      else
 648      {
 649          $usertitles = $mybb->cache->read('usertitles');
 650          foreach($usertitles as $title)
 651          {
 652              if($title['posts'] <= $user['postnum'])
 653              {
 654                  $usertitle = $title;
 655                  break;
 656              }
 657          }
 658  
 659          return $usertitle['title'];
 660      }
 661  }
 662  
 663  /**
 664   * Updates a users private message count in the users table with the number of pms they have.
 665   *
 666   * @param int $uid The user id to update the count for. If none, assumes currently logged in user.
 667   * @param int $count_to_update Bitwise value for what to update. 1 = total, 2 = new, 4 = unread. Combinations accepted.
 668   * @return array The updated counters
 669   */
 670  function update_pm_count($uid=0, $count_to_update=7)
 671  {
 672      global $db, $mybb;
 673  
 674      // If no user id, assume that we mean the current logged in user.
 675      if((int)$uid == 0)
 676      {
 677          $uid = $mybb->user['uid'];
 678      }
 679  
 680      $uid = (int)$uid;
 681      $pmcount = array();
 682      if($uid == 0)
 683      {
 684          return $pmcount;
 685      }
 686  
 687      // Update total number of messages.
 688      if($count_to_update & 1)
 689      {
 690          $query = $db->simple_select("privatemessages", "COUNT(pmid) AS pms_total", "uid='".$uid."'");
 691          $total = $db->fetch_array($query);
 692          $pmcount['totalpms'] = $total['pms_total'];
 693      }
 694  
 695      // Update number of unread messages.
 696      if($count_to_update & 2 && $db->field_exists("unreadpms", "users") == true)
 697      {
 698          $query = $db->simple_select("privatemessages", "COUNT(pmid) AS pms_unread", "uid='".$uid."' AND status='0' AND folder='1'");
 699          $unread = $db->fetch_array($query);
 700          $pmcount['unreadpms'] = $unread['pms_unread'];
 701      }
 702  
 703      if(!empty($pmcount))
 704      {
 705          $db->update_query("users", $pmcount, "uid='".$uid."'");
 706      }
 707      return $pmcount;
 708  }
 709  
 710  /**
 711   * Return the language specific name for a PM folder.
 712   *
 713   * @param int $fid The ID of the folder.
 714   * @param string $name The folder name - can be blank, will use language default.
 715   * @return string The name of the folder.
 716   */
 717  function get_pm_folder_name($fid, $name="")
 718  {
 719      global $lang;
 720  
 721      if($name != '')
 722      {
 723          return $name;
 724      }
 725  
 726      switch($fid)
 727      {
 728          case 0:
 729              return $lang->folder_inbox;
 730              break;
 731          case 1:
 732              return $lang->folder_unread;
 733              break;
 734          case 2:
 735              return $lang->folder_sent_items;
 736              break;
 737          case 3:
 738              return $lang->folder_drafts;
 739              break;
 740          case 4:
 741              return $lang->folder_trash;
 742              break;
 743          default:
 744              return $lang->folder_untitled;
 745      }
 746  }
 747  
 748  /**
 749   * Generates a security question for registration.
 750   *
 751   * @param int $old_qid Optional ID of the old question.
 752   * @return string The question session id.
 753   */
 754  function generate_question($old_qid=0)
 755  {
 756      global $db;
 757  
 758      if($db->type == 'pgsql' || $db->type == 'sqlite')
 759      {
 760          $order_by = 'RANDOM()';
 761      }
 762      else
 763      {
 764          $order_by = 'RAND()';
 765      }
 766  
 767      $excl_old = '';
 768      if($old_qid)
 769      {
 770          $excl_old = ' AND qid != '.(int)$old_qid;
 771      }
 772  
 773      $query = $db->simple_select('questions', 'qid, shown', "active=1{$excl_old}", array('limit' => 1, 'order_by' => $order_by));
 774      $question = $db->fetch_array($query);
 775  
 776      if(!$db->num_rows($query))
 777      {
 778          // No active questions exist
 779          return false;
 780      }
 781      else
 782      {
 783          $sessionid = random_str(32);
 784  
 785          $sql_array = array(
 786              "sid" => $sessionid,
 787              "qid" => $question['qid'],
 788              "dateline" => TIME_NOW
 789          );
 790          $db->insert_query("questionsessions", $sql_array);
 791  
 792          $update_question = array(
 793              "shown" => $question['shown'] + 1
 794          );
 795          $db->update_query("questions", $update_question, "qid = '{$question['qid']}'");
 796  
 797          return $sessionid;
 798      }
 799  }
 800  
 801  /**
 802   * Check whether we can show the Purge Spammer Feature
 803   *
 804   * @param int $post_count The users post count
 805   * @param int $usergroup The usergroup of our user
 806   * @param int $uid The uid of our user
 807   * @return boolean Whether or not to show the feature
 808   */
 809  function purgespammer_show($post_count, $usergroup, $uid)
 810  {
 811          global $mybb, $cache;
 812  
 813          // only show this if the current user has permission to use it and the user has less than the post limit for using this tool
 814          $bangroup = $mybb->settings['purgespammerbangroup'];
 815          $usergroups = $cache->read('usergroups');
 816  
 817          return ($mybb->user['uid'] != $uid && is_member($mybb->settings['purgespammergroups']) && !is_super_admin($uid)
 818              && !$usergroups[$usergroup]['cancp'] && !$usergroups[$usergroup]['canmodcp'] && !$usergroups[$usergroup]['issupermod']
 819              && (str_replace($mybb->settings['thousandssep'], '', $post_count) <= $mybb->settings['purgespammerpostlimit'] || $mybb->settings['purgespammerpostlimit'] == 0)
 820              && !is_member($bangroup, $uid) && !$usergroups[$usergroup]['isbannedgroup']);
 821  }


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