Answers for "fails function in laravel"

valdidate laravel if falid

$validator = Validator::make($request->all(), [
    'name' => 'required|min:2|max:255'
]);

if ($validator->fails()) {
    return view('view_name');
} else {
    return view('view_name');
}

laravel validation

/**
 * Bootstrap any application services.
 *
 * @return void
 */
public function boot()
{
    Validator::extend(...);

    Validator::replacer('foo', function ($message, $attribute, $rule, $parameters) {
        return str_replace(...);
    });
}