在app目录下创建了Articles.php模型文件，然后在控制器中调用时报错。错入如下：

Class 'App\Http\Controllers\Articles' not found

控制器中的代码如下：

namespace App\Http\Controllers;

use Illuminate\Http\Request;

use App\Http\Requests;
use App\Http\Controllers\Controller;

class ArticlesController extends Controller
{
    /**
     * [index 文章首页]
     * @return [type] [description]
     */
    public function index()
    {
        $articles = Articles::all();
        return $articles;
        return view('articles.index');
    }
}

模型层的代码如下：

namespace App;

use Illuminate\Database\Eloquent\Model;

class Articles extends Model
{
    //
}