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   1  <?php // $Id: logout.php,v 1.25 2007/05/15 21:13:23 skodak Exp $
   2  // Logs the user out and sends them to the home page
   3  
   4      require_once("../config.php");
   5  
   6      // can be overriden by auth plugins
   7      $redirect = $CFG->wwwroot.'/';
   8  
   9      $sesskey = optional_param('sesskey', '__notpresent__', PARAM_RAW); // we want not null default to prevent required sesskey warning
  10  
  11      if (!isloggedin()) {
  12          // no confirmation, user has already logged out
  13          require_logout();
  14          redirect($redirect);
  15  
  16      } else if (!confirm_sesskey($sesskey)) {
  17          print_header($SITE->fullname, $SITE->fullname, 'home');
  18          notice_yesno(get_string('logoutconfirm'), 'logout.php', $CFG->wwwroot.'/', array('sesskey'=>sesskey()), null, 'post', 'get');
  19          print_footer();
  20          die;
  21      }
  22  
  23      $authsequence = get_enabled_auth_plugins(); // auths, in sequence
  24      foreach($authsequence as $authname) {
  25          $authplugin = get_auth_plugin($authname);
  26          $authplugin->logoutpage_hook();
  27      }
  28  
  29      require_logout();
  30  
  31      redirect($redirect);
  32  
  33  ?>