how to apply middleware in laravel code example

Example 1: laravel make middleware

php artisan make:middleware CheckAge

Example 2: laravel controller middleware

class UserController extends Controller
{
    /**
     * Instantiate a new controller instance.
     *
     * @return void
     */
    public function __construct()
    {
        $this->middleware('auth');

        $this->middleware('log')->only('index');

        $this->middleware('subscribed')->except('store');
    }
}

Example 3: laravel set middleware default

If you want a middleware to run during every HTTP request to your application, list the middleware class in the $middleware property of your app/Http/Kernel.php class.