remove.php

<?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/>.

/**
 * Ajax requests to this script removes comment. Only teacher or higher roles can remove comments.
 *
 * @package    qbehaviour_studentquiz
 * @copyright  2016 HSR (http://www.hsr.ch)
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

define('AJAX_SCRIPT', true);

require_once(dirname(__FILE__) . '/../../../config.php');
require_once(dirname(__FILE__) . '/lib.php');

$commentid = required_param('id', PARAM_INT);

require_login();
require_sesskey();

header('Content-Type: text/html; charset=utf-8');

if (qbehaviour_studentquiz_check_created_permission($commentid)) {
    $DB->delete_records('studentquiz_comment', array('id' => $commentid));
} else {
    return http_response_code(401);
}