Type Rules

Type validation rules check object types and special formats like credit cards.

Rules Reference

Rule	Parameters	Example	Error Message
instanceOf	class	$v->rule('instanceOf', 'field', DateTime::class)	{field} must be an instance of {0}
creditCard	type?, allowedTypes?	$v->rule('creditCard', 'field')	{field} must be a valid credit card number

Note: Parameters marked with ? are optional.

Parameter Details

instanceOf

The class parameter accepts a class name string or an object instance. Inheritance is respected:

$v->rule('instanceOf', 'obj', BaseClass::class); // ChildClass passes

creditCard

Validates using the Luhn algorithm. Spaces and dashes are stripped automatically.

Parameter	Type	Description
type	string|array|null	Card type(s) to validate: visa, mastercard, amex, dinersclub, discover
allowedTypes	array|null	Restrict accepted types when type comes from client

Supported card types:

Slug	Card Type	Prefix Pattern
visa	Visa	4xxx
mastercard	Mastercard	51-55, 2221-2720
amex	American Express	34, 37
dinersclub	Diners Club	300-305, 36, 38
discover	Discover	6011, 644-649, 65

Examples:

// Any valid card
$v->rule('creditCard', 'card_number');

// Specific type
$v->rule('creditCard', 'card_number', 'visa');

// Multiple types
$v->rule('creditCard', 'card_number', ['visa', 'mastercard']);

// Client-provided type with restrictions
$v->rule('creditCard', 'card_number', $clientType, ['visa', 'mastercard']);

---

Complete Examples

Valicomb supports two syntax styles: rule-based (map rules to fields) and field-based (map fields to rules).

Field-Based Mapping

use Frostybee\Valicomb\Validator;

$v = new Validator($data);

$v->forFields([
    'card_number' => ['required', 'creditCard'],
    'visa_card' => ['optional', ['creditCard', 'visa']],
    'payment_card' => ['required', ['creditCard', ['visa', 'mastercard', 'amex']]],
    'created_at' => ['required', ['instanceOf', \DateTime::class]],
    'user' => ['required', ['instanceOf', User::class]],
    'config' => ['optional', ['instanceOf', ConfigInterface::class]]
]);

$v->validate();

Rule-Based Array Syntax

use Frostybee\Valicomb\Validator;

$v = new Validator($data);

$v->rules([
    'instanceOf' => [
        ['created_at', \DateTime::class],
        ['updated_at', \DateTime::class],
        ['user', User::class],
        ['logger', \Psr\Log\LoggerInterface::class]
    ],
    'creditCard' => [
        ['card_number'],
        ['backup_card', ['visa', 'mastercard']]
    ]
]);

$v->validate();