The folks over at LinuxToday have a pointer this morning to an interesting article from DevX - Use XML to Build Services Cheaply Using PHP and MySQL

The idea here is to use the built-in features of PHP and MySQL to generate an XML structure that you can do just about anything with. The possibilities include data transfer between applications, "skins" for the data contained in the XML with XSLT, and even just outputing the XML as HTML for viewing in a browser. They step you through what you'll need to install, as well as some sample ways to generate the XML from the MySQL database.

The article gets pretty general when it comes to making the XML, and doesn't really follow through on its promises to show you how to use it all those different ways, but it's a good starting place - especially if you haven't had much experience setting up Apache/MySQL/PHP before.