mini\Validator\Validator::custom() Method

Signature

public function custom(Closure $callback): static

Parameters

Returns

static

Documentation

Custom validation callback (for server-side validation only)

Use this for PHP-specific validations that cannot be exported to JSON Schema, such as instance checks, filter_var validations, or any custom PHP logic.

The callback should return truthy if valid, falsy if invalid.

When validating object properties or array items, the callback can optionally accept a second parameter for the parent context (containing object/array):

Examples:

// Simple validation (just the value)
$validator->custom(fn($v) => $v instanceof SomeClass)

// With parent context (for relational validation)
$userValidator = (new Validator)
    ->type('object')
    ->forProperty('password_confirmation',
        (new Validator)->custom(fn($confirmation, $user) =>
            $confirmation === $user['password']
        )
    );

Source

src/Validator/Validator.php:744-747