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See Release Notes

  • Bug fixes for general core bugs in 4.2.x will end 22 April 2024 (12 months).
  • Bug fixes for security issues in 4.2.x will end 7 October 2024 (18 months).
  • PHP version: minimum PHP 8.0.0 Note: minimum PHP version has increased since Moodle 4.1. PHP 8.1.x is supported too.
<?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/>.

/**
 * This file is used to call any registered externallib function in Moodle.
 *
 * It will process more than one request and return more than one response if required.
 * It is recommended to add webservice functions and re-use this script instead of
 * writing any new custom ajax scripts.
 *
 * @since Moodle 2.9
 * @package core
 * @copyright 2015 Damyon Wiese
 * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

> use core_external\external_api; define('AJAX_SCRIPT', true); > use core_external\external_settings; // Services can declare 'readonlysession' in their config located in db/services.php, if not present will default to false. >
define('READ_ONLY_SESSION', true); if (!empty($_GET['nosessionupdate'])) { define('NO_SESSION_UPDATE', true); } require_once(__DIR__ . '/../../config.php');
< require_once($CFG->libdir . '/externallib.php');
define('PREFERRED_RENDERER_TARGET', RENDERER_TARGET_GENERAL); $arguments = ''; $cacherequest = false; if (defined('ALLOW_GET_PARAMETERS')) { $arguments = optional_param('args', '', PARAM_RAW); $cachekey = optional_param('cachekey', '', PARAM_INT); if ($cachekey && $cachekey > 0 && $cachekey <= time()) { $cacherequest = true; } } // Either we are not allowing GET parameters or we didn't use GET because // we did not pass a cache key or the URL was too long. if (empty($arguments)) { $arguments = file_get_contents('php://input'); } $requests = json_decode($arguments, true); if ($requests === null) { $lasterror = json_last_error_msg(); throw new coding_exception('Invalid json in request: ' . $lasterror); } $responses = array(); // Defines the external settings required for Ajax processing. $settings = external_settings::get_instance(); $settings->set_file('pluginfile.php'); $settings->set_fileurl(true); $settings->set_filter(true); $settings->set_raw(false); $haserror = false; foreach ($requests as $request) { $response = array(); $methodname = clean_param($request['methodname'], PARAM_ALPHANUMEXT); $index = clean_param($request['index'], PARAM_INT); $args = $request['args']; $response = external_api::call_external_function($methodname, $args, true); $responses[$index] = $response;
>
if ($response['error']) {
< // Do not process the remaining requests.
$haserror = true;
> if (!NO_MOODLE_COOKIES) { break; > // If there was an error, and this HTTP request includes a Moodle cookie (and therefore a login), reject all } > // subsequent changes. } > // > // The reason for this is that an earlier step may be performing a dependant action. Consider the following: if ($cacherequest && !$haserror) { > // 1) Backup a thing // 90 days only - based on Moodle point release cadence being every 3 months. > // 2) Reset the thing to its initial state $lifetime = 60 * 60 * 24 * 90; > // 3) Restore the thing from the backup made in step 1. > // header('Expires: '. gmdate('D, d M Y H:i:s', time() + $lifetime) .' GMT'); > // In the above example you do not want steps 2 and 3 to happen if step 1 fails. header('Pragma: '); > // Do not process the remaining requests. header('Cache-Control: public, max-age=' . $lifetime . ', immutable'); > header('Accept-Ranges: none'); > // If the request came through service-nologin.php which does not allow any kind of login, } > // then it is not possible to make changes to the DB, session, site, etc. > // For all other cases, we *MUST* stop processing subsequent requests.
echo json_encode($responses);
> }