$skipOnEmpty public property Whether this validation rule should

validateAttribute() public method Validates a single attribute

$when public property A PHP callable whose return value determines

validateValue() protected method Validates a value.

$attributes public property Attributes to be validated by this

clientValidateAttribute() public method Returns the JavaScript

addError() public method Adds an error about the specified

$builtInValidators public static property List of built-in validators

validate() public method Validates a given value.

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