### 定義中間件 ``` php think make:middleware 中間件的名稱 這個指令會?application/http/middleware目錄下面生成一個中間件文件 ``` ``` namespace app\http\middleware; class checkLogin { public function handle($request, \Closure $next) { echo "你好 "; return $next($request); } } ``` ``` class Index extends Controller { protected $middleware = [ 'checkLogin' ]; public function index() { return 'hello, tp5.1 '; } } ```