isEmpty() public method Checks if the given value is empty

$skipOnError public property Whether this validation rule should

createValidator() public static method Creates a validator

$isEmpty public property A PHP callable that replaces the default

validate() public method Validates a given value.

$enableClientValidation public property Whether to enable client-side

$except public property Scenarios that the validator should not

$whenClient public property A JavaScript function name whose return

$message public property The user-defined error message. It may

$on public property Scenarios that the validator can be applied