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   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  $returnurl = optional_param('returnurl', null, PARAM_LOCALURL);
  31  
  32  // If we have got here as a confirmed aciton, do it.
  33  if ($confirm && isloggedin() && confirm_sesskey()) {
  34      require_capability('moodle/site:config', context_system::instance());
  35  
  36      // Valid request. Purge, and redirect the user back to where they came from.
  37      purge_all_caches();
  38  
  39      if ($returnurl) {
  40          $returnurl = $CFG->wwwroot . $returnurl;
  41      } else {
  42          $returnurl = new moodle_url('/admin/purgecaches.php');
  43      }
  44      redirect($returnurl, get_string('purgecachesfinished', 'admin'));
  45  }
  46  
  47  // Otherwise, show a button to actually purge the caches.
  48  admin_externalpage_setup('purgecaches');
  49  
  50  $actionurl = new moodle_url('/admin/purgecaches.php', array('sesskey'=>sesskey(), 'confirm'=>1));
  51  if ($returnurl) {
  52      $actionurl->param('returnurl', $returnurl);
  53  }
  54  
  55  echo $OUTPUT->header();
  56  echo $OUTPUT->heading(get_string('purgecaches', 'admin'));
  57  
  58  echo $OUTPUT->box_start('generalbox', 'notice');
  59  echo html_writer::tag('p', get_string('purgecachesconfirm', 'admin'));
  60  echo $OUTPUT->single_button($actionurl, get_string('purgecaches', 'admin'), 'post');
  61  echo $OUTPUT->box_end();
  62  
  63  echo $OUTPUT->footer();