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  * @package    core
  22  * @subpackage auth
  23  * @copyright  1999 onwards Martin Dougiamas  http://dougiamas.com
  24  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  25  */
  26
  27 require_once('../config.php');
  28
  29 $PAGE->set_url('/login/logout.php');
  30 $PAGE->set_context(context_system::instance());
  31
  32 $sesskey = optional_param('sesskey', '__notpresent__', PARAM_RAW); // we want not null default to prevent required sesskey warning
  33 $login   = optional_param('loginpage', 0, PARAM_BOOL);
  34
  35 // can be overridden by auth plugins
  36 if ($login) {
  37     $redirect = get_login_url();
  38 } else {
  39     $redirect = $CFG->wwwroot.'/';
  40 }
  41
  42 if (!isloggedin()) {
  43     // no confirmation, user has already logged out
  44     require_logout();
  45     redirect($redirect);
  46
  47 } else if (!confirm_sesskey($sesskey)) {
  48     $PAGE->set_title($SITE->fullname);
  49     $PAGE->set_heading($SITE->fullname);
  50     echo $OUTPUT->header();
  51     echo $OUTPUT->confirm(get_string('logoutconfirm'), new moodle_url($PAGE->url, array('sesskey'=>sesskey())), $CFG->wwwroot.'/');
  52     echo $OUTPUT->footer();
  53     die;
  54 }
  55
  56 $authsequence = get_enabled_auth_plugins(); // auths, in sequence
  57 foreach($authsequence as $authname) {
  58     $authplugin = get_auth_plugin($authname);
  59     $authplugin->logoutpage_hook();
  60 }
  61
  62 require_logout();
  63
  64 redirect($redirect);