Why in the controller method to specify the Request type for the argument?

Question

Laravel

Here is a controller method in Laravel, why specify the Request type? I understand why this is needed here (with a simple type):
public function store(Request $request) { }

function test(int $x) {
  return $x;
}
var_dump(test(1.6)); // 1

Answer 1

For Request $request in Laravel, you can define validations by creating your own Request.
php artisan make:request StorePostRequest
Read https://laravel.com/docs/8.x/validation#creating-f...
And much more can Request