This is a demonstration of a very fast and easy way to build AJAX-type applications where communications between JavaScript on the client side and PHP5 on the server side is ideal. This library makes development of such systems fast and very simple.

In his example he shows how to create the PHP and Javascript functions that let the service talk back and forth. He defines a simple "Hello World" style application to show how it would be structured. He also includes a bit of more complex that has other functionality - getting a value out of an array and returning a property/private variable from the backend class.

HTMLPurifer is possibly the most understated underpublicised quality library in PHP today. I consider it a fundamental standard library that is automatically included in every PHP web application I start these days.

This latest release candidate (their first!) includes updates on two major features - the use of autoloading and a change to the way you use the filters. Check out a demo of it in action or just download this latest release and try it out for yourself.