Validation is not work on laravel 5.2.32 - php

Question

I am using Laravel 5.2.32, the validation of it is not work. I have tried to find solution on google and stackoverflow. However, the solution which can fix the 5.2.20 to 5.2.26 cannot fix the problem of laravel 5.2.32. Who can help me?
I have changed the router in the web middleware, the code as the following:
Route::group(['middleware' => ['web']], function () {
Route::get('/', function () {
return view('app/welcome');
});
Route::post('/signup', 'UserController#postSignup');
Route::post('/signin', 'UserController#postSignin');
Route::get('/dashboard', 'UserController#getDashboard');
Route::get('/logout', 'UserController#getLogout');
});
I also change the Kernel.php as the following. But it's still not work.
protected $middleware = [
\Illuminate\Foundation\Http\Middleware\CheckForMaintenanceMode::class,
\app\Http\Middleware\EncryptCookies::class,
\Illuminate\Cookie\Middleware\AddQueuedCookiesToResponse::class,
\Illuminate\Session\Middleware\StartSession::class,
\Illuminate\View\Middleware\ShareErrorsFromSession::class,
\app\Http\Middleware\VerifyCsrfToken::class,
];
The code in my controller as below:
namespace app\Http\Controllers;
use app\User;
use Illuminate\Http\Request;
use app\Http\Requests;
use Illuminate\Support\Facades\Auth;
use Illuminate\View\Middleware\ErrorBinder;
use Validator;
class UserController extends Controller
{
// public function __construct()
// {
// $this->middleware('auth');
// }
public function postSignUp(Request $request)
{
$this->validate($request, [
'email' => 'required | email | unique:users',
'first_name' => 'required | max:60',
'password' => 'required | min:8'
]);
if ($request['password'] === $request['password_confirmation'])
{
$user = new User();
$user->first_name = $request['first_name'];
$user->email = $request['email'];
$user->password = bcrypt($request['password']);
$user->save();
Auth::login($user);
return view('app/dashboard');
}
// return redirect()->back();
}
}

Answer 1

you don't need the middleware web in your route anymore as its baked in to the latest version, s can do without the following:
Route::group(['middleware' => ['web']], function () {...
and your kernel something like...
/**
* The application's global HTTP middleware stack.
*
* These middleware are run during every request to your application.
*
* #var array
*/
protected $middleware = [
\Illuminate\Foundation\Http\Middleware\CheckForMaintenanceMode::class,
];
/**
* The application's route middleware groups.
*
* #var array
*/
protected $middlewareGroups = [
'web' => [
\App\Http\Middleware\EncryptCookies::class,
\Illuminate\Cookie\Middleware\AddQueuedCookiesToResponse::class,
\Illuminate\Session\Middleware\StartSession::class,
\Illuminate\View\Middleware\ShareErrorsFromSession::class,
\App\Http\Middleware\VerifyCsrfToken::class,
],
'api' => [
'throttle:60,1',
],
];
/**
* The application's route middleware.
*
* These middleware may be assigned to groups or used individually.
*
* #var array
*/
protected $routeMiddleware = [
'auth' => \App\Http\Middleware\Authenticate::class,
'auth.basic' => \Illuminate\Auth\Middleware\AuthenticateWithBasicAuth::class,
'can' => \Illuminate\Foundation\Http\Middleware\Authorize::class,
'guest' => \App\Http\Middleware\RedirectIfAuthenticated::class,
'throttle' => \Illuminate\Routing\Middleware\ThrottleRequests::class,
];