> 为了方便使用服务类，特地新增了常用的助手函数，具体使用请看下面： ```php /** * 获取配置项 * @param string $key 配置键名,支持'user.name'形式的读取方式 * @param mixed $default 配置不存在时的默认值,默认为null * @return mixed 成功返回配置值,配置不存在返回默认值 */ function config($key, $default = null) { return \Lying::config($key, $default); } /** * 返回Maker实例 * @return \lying\service\Maker */ function maker() { return \Lying::$maker; } /** * 返回Request实例 * @return \lying\service\Request */ function request() { return \Lying::$maker->request; } /** * 返回Response实例 * @return \lying\service\Response */ function response() { return \Lying::$maker->response; } /** * 返回Router实例 * @return \lying\service\Router */ function router() { return \Lying::$maker->router; } /** * 返回Helper实例 * @return \lying\service\Helper */ function helper() { return \Lying::$maker->helper; } /** * 返回Session实例 * @return \lying\service\Session */ function session() { return \Lying::$maker->session; } /** * 返回Cookie实例 * @return \lying\service\Cookie */ function cookie() { return \Lying::$maker->cookie; } /** * 返回Hook实例 * @return \lying\service\Hook */ function hook() { return \Lying::$maker->hook; } /** * 返回Encrypter实例 * @return \lying\service\Encrypter */ function encrypter() { return \Lying::$maker->encrypter; } /** * 返回Dispatch实例 * @return \lying\service\Dispatch */ function dispatch() { return \Lying::$maker->dispatch; } /** * 返回View实例 * @return \lying\view\View */ function view() { return \Lying::$maker->view; } /** * 返回Redis实例 * @param string $id 实例ID * @return \lying\service\Redis */ function redis($id = 'redis') { return \Lying::$maker->redis($id); } /** * 返回Cache实例 * @param string $id 实例ID * @return \lying\cache\Cache */ function cache($id = 'cache') { return \Lying::$maker->cache($id); } /** * 返回Connection实例 * @param string $id 实例ID * @return \lying\db\Connection */ function db($id = 'db') { return \Lying::$maker->db($id); } /** * 返回Captcha实例 * @param string $id 实例ID * @return \lying\captcha\Captcha */ function captcha($id = 'captcha') { return \Lying::$maker->captcha($id); } ```