Zend_Validator question?

Zend Framework has Zend_Validate_Alpha (as well as an alphanumeric version ).

It usually does not allow whitespace, but if you pass a class to Zend_Validate_Alpha'strue

constructor it will allow whitespace. It's the same with Zend_Validate_Alnum .

For example:

$validator = new Zend_Validate_Alpha(true); //will allow whitespace and non number letters