laravel error(newbie)

gan, ane ikutin tutorial laravel sekolah koding kan, nah ane ikutin sampe video ketiga dengan judul "controller & blade" ane dapet error

 C:\Users\BN000031691\blog\app\Http\Controllers\Controller.php
    <?php

namespace App\Http\Controllers;

use Illuminate\Foundation\Bus\DispatchesJobs;
use Illuminate\Routing\Controller as BaseController;
use Illuminate\Foundation\Validation\ValidatesRequests;
use Illuminate\Foundation\Auth\Access\AuthorizesRequests;

class Controller extends BaseController
{
    use AuthorizesRequests, DispatchesJobs, ValidatesRequests;
}

Arguments
"Namespace declaration statement has to be the very first statement or after any declare call in the script"

ini kodingan ane di route ->

 <?php

Route::get('/', function () {
    return view('welcome');
});

Route::get('/blog','BlogController@index' );

ini yang di controller ->

 <?php
namespace App\Http\Controllers;

use Illuminate\Http\Request;

class BlogController extends Controller
{
   public function index()
   {
        return ' hello hello';

   }
}

bingung ane. tutorial ngga ada yg lewat padahal. ane jalanin di localhost:8000/blog gan. ane pake xampp.

mohon bantuannya gan. thanks.

(edit) sudah terjawab di another forum. terimakasih.