[From PHP Builder
AJAX and PHP 5 both have powerful features for processing and using an XML document. XML is a method of formatting data often for communication purposes between different computer systems. In this article, we will show you how to access an XML document with AJAX!
Basically the AJAX client-browser and the PHP server can communicate any kind of data (except images and binary) by means of XML documents. Part 1 of this series on AJAX and PHP showed the basics of AJAX communication, and if you are not familiar with AJAX you should read Part 1. This article will focus on processing requested XML data within the client-browser, and we will touch on the PHP server side XML processing as well.
The article continues at