Table of Contents
Zend_Filter
provides a library of static methods
for filtering data. For input filtering, you should use Chapter 7, Zend_InputFilter instead, because it provides a framework for
filtering input using the methods provided by this class. However, because
Zend_InputFilter
is designed primarily for arrays,
Zend_Filter
can be useful for filtering scalars, because
it behaves like PHP's string functions:
<?php $alphaUsername = Zend_Filter::getAlpha('John123Doe'); /* $alphaUsername = 'JohnDoe'; */ ?>