uuid2 */ public static function compare($uuid1, $uuid2) { return strcmp($uuid1, $uuid2); } /** * @desc Check wheter an UUID is the NULL UUID 00000000-0000-0000-0000-000000000000 * @return string */ public function is_null($uuid) { return 0 == strcmp($uuid, '00000000-0000-0000-0000-000000000000'); } }