View file File name : SessionUpdateTimestampHandlerInterface.php Content :<?php interface SessionUpdateTimestampHandlerInterface { /** * Checks if a session identifier already exists or not. * * @param string $key * * @return bool */ public function validateId($key); /** * Updates the timestamp of a session when its data didn't change. * * @param string $key * @param string $val * * @return bool */ public function updateTimestamp($key, $val); }