| Commit | Line | Data |
|---|---|---|
| 69dd0c8c EL |
1 | <?php |
| 2 | ||
| 3 | // This file is part of Moodle - http://moodle.org/ | |
| 4 | // | |
| 5 | // Moodle is free software: you can redistribute it and/or modify | |
| 6 | // it under the terms of the GNU General Public License as published by | |
| 7 | // the Free Software Foundation, either version 3 of the License, or | |
| 8 | // (at your option) any later version. | |
| 9 | // | |
| 10 | // Moodle is distributed in the hope that it will be useful, | |
| 11 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 13 | // GNU General Public License for more details. | |
| 14 | // | |
| 15 | // You should have received a copy of the GNU General Public License | |
| 16 | // along with Moodle. If not, see <http://www.gnu.org/licenses/>. | |
| 17 | ||
| 18 | /** | |
| 19 | * @package moodlecore | |
| 20 | * @subpackage backup-helper | |
| 21 | * @copyright 2010 onwards Eloy Lafuente (stronk7) {@link http://stronk7.com} | |
| 22 | * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later | |
| 23 | */ | |
| 24 | ||
| 25 | /** | |
| 26 | * Non instantiable helper class providing general helper methods for backup/restore | |
| 27 | * | |
| 28 | * This class contains various general helper static methods available for backup/restore | |
| 29 | * | |
| 30 | * TODO: Finish phpdocs | |
| 31 | */ | |
| 32 | abstract class backup_general_helper extends backup_helper { | |
| 33 | ||
| 34 | /** | |
| 35 | * Calculate one checksum for any array/object. Works recursively | |
| 36 | */ | |
| 37 | public static function array_checksum_recursive($arr) { | |
| 38 | ||
| 39 | $checksum = ''; // Init checksum | |
| 40 | ||
| 41 | // Check we are going to process one array always, objects must be cast before | |
| 42 | if (!is_array($arr)) { | |
| 43 | throw new backup_helper_exception('array_expected'); | |
| 44 | } | |
| 45 | foreach ($arr as $key => $value) { | |
| 46 | if ($value instanceof checksumable) { | |
| 47 | $checksum = md5($checksum . '-' . $key . '-' . $value->calculate_checksum()); | |
| 48 | } else if (is_object($value)) { | |
| 49 | $checksum = md5($checksum . '-' . $key . '-' . self::array_checksum_recursive((array)$value)); | |
| 50 | } else if (is_array($value)) { | |
| 51 | $checksum = md5($checksum . '-' . $key . '-' . self::array_checksum_recursive($value)); | |
| 52 | } else { | |
| 53 | $checksum = md5($checksum . '-' . $key . '-' . $value); | |
| 54 | } | |
| 55 | } | |
| 56 | return $checksum; | |
| 57 | } | |
| 58 | } |
