为自定义验证规则命名- Laravel 8

use Illuminate\Validation\Rule;

$validator = Validator::make($request->all(), [
    'email' => [
        'required',
        Rule::unique('users')->ignore($user->id),
        function ($attribute, $value, $fail) {
            if (!filter_var($value, FILTER_VALIDATE_EMAIL)) {
                $fail('The email is not valid.');
            }
        },
    ],
]);

php artisan make:rule CustomEmailRule

namespace App\Rules;

use Illuminate\Contracts\Validation\Rule;

class CustomEmailRule implements Rule
{
    public function passes($attribute, $value)
    {
        return filter_var($value, FILTER_VALIDATE_EMAIL);
    }

    public function message()
    {
        return 'The :attribute is not a valid email address.';
    }
}

use App\Rules\CustomEmailRule;

$validator = Validator::make($request->all(), [
    'email' => ['required', new CustomEmailRule],
]);