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<?php // This file is part of Moodle - http://moodle.org/ // // Moodle is free software: you can redistribute it and/or modify // it under the terms of the GNU General Public License as published by // the Free Software Foundation, either version 3 of the License, or // (at your option) any later version. // // Moodle is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // // You should have received a copy of the GNU General Public License // along with Moodle. If not, see <http://www.gnu.org/licenses/>. /** * Functions common to the question usage statistics code. * * @package moodlecore * @subpackage questionbank * @copyright 2013 The Open University * @author Jamie Pratt <me@jamiep.org> * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later */ defined('MOODLE_INTERNAL') || die(); /** * Question statistics cron code. Deletes cached stats more than a certain age. */ function question_usage_statistics_cron() { global $DB; $expiretime = time() - 5 * HOURSECS; mtrace("\n Cleaning up old question statistics cache records...", ''); $DB->delete_records_select('question_statistics', 'timemodified < ?', array($expiretime)); $responseanlysisids = $DB->get_records_select_menu('question_response_analysis', 'timemodified < ?', array($expiretime), 'id', 'id, id AS id2'); $DB->delete_records_list('question_response_analysis', 'id', $responseanlysisids); $DB->delete_records_list('question_response_count', 'analysisid', $responseanlysisids); mtrace('done.'); return true; }
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