what is Controller Middleware in laravel

Answer

Middleware may be specified on controller routes like so:

Route::get('profile', [
    'middleware' => 'auth',
    'uses' => 'UserController@showProfile'
]);

Additionally, you may specify middleware within your controller's constructor:

class UserController extends Controller {

    /**
     * Instantiate a new UserController instance.
     */
    public function __construct()
    {
        $this->middleware('auth');

        $this->middleware('log', ['only' => ['fooAction', 'barAction']]);

        $this->middleware('subscribed', ['except' => ['fooAction', 'barAction']]);
    }

}