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See Release Notes

  • Bug fixes for general core bugs in 3.10.x will end 8 November 2021 (12 months).
  • Bug fixes for security issues in 3.10.x will end 9 May 2022 (18 months).
  • PHP version: minimum PHP 7.2.0 Note: minimum PHP version has increased since Moodle 3.8. PHP 7.3.x and 7.4.x are supported too.

Differences Between: [Versions 310 and 311]

   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   * A scheduled task to remove unneeded random questions.
  19   *
  20   * @package   qtype_random
  21   * @category  task
  22   * @copyright 2018 Bo Pierce <email.bO.pierce@gmail.com>
  23   * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  24   */
  25  
  26  namespace qtype_random\task;
  27  
  28  defined('MOODLE_INTERNAL') || die();
  29  
  30  
  31  /**
  32   * A scheduled task to remove unneeded random questions.
  33   *
  34   * @copyright 2018 Bo Pierce <email.bO.pierce@gmail.com>
  35   * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  36   */
  37  class remove_unused_questions extends \core\task\scheduled_task {
  38  
  39      public function get_name() {
  40          return get_string('taskunusedrandomscleanup', 'qtype_random');
  41      }
  42  
  43      public function execute() {
  44          global $DB, $CFG;
  45          require_once($CFG->libdir . '/questionlib.php');
  46  
  47          // Find potentially unused random questions (up to 10000).
  48          // Note, because we call question_delete_question below,
  49          // the question will not actually be deleted if something else
  50          // is using them, but nothing else in Moodle core uses qtype_random,
  51          // and not many third-party plugins do.
  52          $unusedrandomids = $DB->get_records_sql("
  53                  SELECT q.id, 1
  54                    FROM {question} q
  55               LEFT JOIN {quiz_slots} qslots ON q.id = qslots.questionid
  56                   WHERE qslots.questionid IS NULL
  57                     AND q.qtype = ? AND hidden = ?", ['random', 0], 0, 10000);
  58  
  59          $count = 0;
  60          foreach ($unusedrandomids as $unusedrandomid => $notused) {
  61              question_delete_question($unusedrandomid);
  62              // In case the question was not actually deleted (because it was in use somehow
  63              // mark it as hidden so the query above will not return it again.
  64              $DB->set_field('question', 'hidden', 1, ['id' => $unusedrandomid]);
  65              $count += 1;
  66          }
  67          mtrace('Cleaned up ' . $count . ' unused random questions.');
  68      }
  69  }