New on WebReference.com is this look (part of a series) at working with XML in PHP, this time it's specifically covering the DOM functionality.
With this series of articles, I will try to simplify and demystify the use and application of XML and the DOM. First, we will look at what XML is and then move on to what functions are available for use to manipulate and use XML.
The tutorial introduces XML and gives a sample structure of a document and breaks it down to explain each of the parts. Following that they look at some of the XML-related functionality to create their sample XML file.
The article is informative, and has some good explanation. But I wouldn't suggest actually writing XML-aware applications this way anymore. It'd lead to a maintenance nightmare and buggy code (the XML in the article will not validate because of case typos, for example.)