auth = $auth;        $this->registrar = $registrar;        //注册auth.attemp事件        //加入验证码的验证        $this->auth->attempting(function()use($request){            $phrase = \Session::get('phrase');            if($request->input('phrase') != $phrase){                throw new HttpResponseException(                    redirect('/auth/login')->withInput($request->input())->withErrors(['phrase'=>'验证码错误'])                );            }        });        $this->middleware('guest', ['except' => 'getLogout']);    }}

需要特别说明的是HttpResponseException这个异常，这个异常接收一个Response作为参数,在Illuminate\Routing\Route的run方法中会捕获这个异常并返回设置的Response,所以我们可以通过抛出这个异常来终止我们的应用程序并跳转

public function run(Request $request)    {        $this->container = $this->container ?: new Container;        try        {            if ( ! is_string($this->action['uses']))                return $this->runCallable($request);            if ($this->customDispatcherIsBound())                return $this->runWithCustomDispatcher($request);            return $this->runController($request);        }        catch (HttpResponseException $e)        {            return $e->getResponse();        }    }