如果你比较习惯使用thinkphp3中常量用法，可以在入口文件定义常量
define('CONTROLLER_NAME',Request::instance()->controller());
define('MODULE_NAME',Request::instance()->module());
define('ACTION_NAME',Request::instance()->action());
=====
define('CONTROLLER_NAME',request()->controller());
define('MODULE_NAME',request()->module());
define('ACTION_NAME',request()->action());
