login/logout.php

   1 <?php
   2
   3 // This file is part of Moodle - http://moodle.org/
   4 //
   5 // Moodle is free software: you can redistribute it and/or modify
   6 // it under the terms of the GNU General Public License as published by
   7 // the Free Software Foundation, either version 3 of the License, or
   8 // (at your option) any later version.
   9 //
  10 // Moodle is distributed in the hope that it will be useful,
  11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 // GNU General Public License for more details.
  14 //
  15 // You should have received a copy of the GNU General Public License
  16 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  17
  18 /**
  19  * Logs the user out and sends them to the home page
  20  *
  21  * @copyright 1999 Martin Dougiamas  http://dougiamas.com
  22  * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  23  * @package login
  24  */
  25
  26 require_once("../config.php");
  27
  28 // can be overriden by auth plugins
  29 $redirect = $CFG->wwwroot.'/';
  30
  31 $sesskey = optional_param('sesskey', '__notpresent__', PARAM_RAW); // we want not null default to prevent required sesskey warning
  32
  33 if (!isloggedin()) {
  34     // no confirmation, user has already logged out
  35     require_logout();
  36     redirect($redirect);
  37
  38 } else if (!confirm_sesskey($sesskey)) {
  39     $url = new moodle_url('/login/logout.php');
  40     if ($sesskey !== '__notpresent__') $url->param('sesskey', $sesskey);
  41     $PAGE->set_url($url);
  42     $PAGE->set_title($SITE->fullname);
  43     $PAGE->set_heading($SITE->fullname);
  44     echo $OUTPUT->header();
  45     echo $OUTPUT->confirm(get_string('logoutconfirm'), 'logout.php', $CFG->wwwroot.'/');
  46     echo $OUTPUT->footer();
  47     die;
  48 }
  49
  50 $authsequence = get_enabled_auth_plugins(); // auths, in sequence
  51 foreach($authsequence as $authname) {
  52     $authplugin = get_auth_plugin($authname);
  53     $authplugin->logoutpage_hook();
  54 }
  55
  56 require_logout();
  57
  58 redirect($redirect);