admin/purgecaches.php

   1 <?php
   2 // This file is part of Moodle - http://moodle.org/
   3 //
   4 // Moodle is free software: you can redistribute it and/or modify
   5 // it under the terms of the GNU General Public License as published by
   6 // the Free Software Foundation, either version 3 of the License, or
   7 // (at your option) any later version.
   8 //
   9 // Moodle is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13 //
  14 // You should have received a copy of the GNU General Public License
  15 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  16
  17 /**
  18  * This script triggers a full purging of system caches,
  19  * this is useful mostly for developers who did not disable the caching.
  20  *
  21  * @package    core
  22  * @copyright  2010 Petr Skoda {@link http://skodak.org}
  23  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  24  */
  25
  26 require_once('../config.php');
  27 require_once($CFG->libdir.'/adminlib.php');
  28
  29 $confirm = optional_param('confirm', 0, PARAM_BOOL);
  30
  31 admin_externalpage_setup('purgecaches');
  32
  33 require_login();
  34 require_capability('moodle/site:config', get_context_instance(CONTEXT_SYSTEM));
  35
  36 if ($confirm) {
  37     require_sesskey();
  38
  39     // Valid request. Purge, and redisplay the form so it is easy to purge again
  40     // in the near future.
  41     purge_all_caches();
  42     redirect(new moodle_url('/admin/purgecaches.php'), get_string('purgecachesfinished', 'admin'));
  43
  44 } else {
  45     // Show a confirm form.
  46     echo $OUTPUT->header();
  47     echo $OUTPUT->heading(get_string('purgecaches', 'admin'));
  48
  49     $url = new moodle_url('/admin/purgecaches.php', array('sesskey'=>sesskey(), 'confirm'=>1));
  50     $button = new single_button($url, get_string('purgecaches','admin'), 'post');
  51
  52     // Cancel button takes them back to the page the were on, if possible,
  53     // otherwise to the site home page.
  54     $return = new moodle_url('/');
  55     if (isset($_SERVER['HTTP_REFERER']) and !empty($_SERVER['HTTP_REFERER'])) {
  56         if ($_SERVER['HTTP_REFERER'] !== "$CFG->wwwroot/$CFG->admin/purgecaches.php") {
  57             $return = $_SERVER['HTTP_REFERER'];
  58         }
  59     }
  60
  61     echo $OUTPUT->confirm(get_string('purgecachesconfirm', 'admin'), $button, $return);
  62     echo $OUTPUT->footer();
  63 }