sameAs()

Use sameAs() for confirmation fields such as password confirmation. It is evaluated during object validation.

ValidationRegistry::register(
    Registration::class,
    static fn (RuleSet $rules): array => [
        $rules->string('password'),
        $rules->string('passwordConfirmation')->sameAs('password'),
    ]
);

The failure code is same_as.

The comparison uses the current field’s value and the named property on the same object. It is not a comparison between two arguments passed to validate().

$user = new User();
$user->password = 'secret';
$user->passwordConfirmation = 'different';

$error = Rule::for($user)
    ->string('passwordConfirmation')
    ->sameAs('password')
    ->validate();

Use Rule::for(), Rule::on(), RuleSet, or ValidationHandler so Fynix has object context.

Pass a closure when the comparison value must be derived from the current object. The closure receives the object and returns the value to compare:

$rule = Rule::for($user)
    ->string('passwordConfirmation')
    ->sameAs(static fn (User $user): string => $user->password);