On PHPit.net today, there's part one of their new series - "PHP:Form - Validators & Client-side Validation".

Welcome to the first part of a new two-part series on the PHP:Form web component. In this part, I will give you an introduction to PHP:Form, its features, and why it is so useful. I will also discuss the inbuilt validators that PHP:Form supports. In the second part I will discuss the more advanced features of PHP:Form.

PHP:Form is a script that's designed to help you create forms quickly and easily, and includes built-in support for input validation. They show you how to harness this ability and use it in your scripts. There's some sample code along the way, and plenty of explaination as well...