Background: So i'm writing a web-service style web application as a way to increase my knowledge of how PHP and XML work together. I want to eventually take that XML data and use it in a mobile phone application but that's a different issue. I can connect to the data, pull, and process all the information with PHP and I've managed to get it exporting to CSV. I want to now begin to push that data out in XML.
Question: What is the (a) recommended way to work with XML in PHP?
References: PHP Manual, XML Portion