XML is a large topic, worthy of a book in its own right, as the bookstore shelves testify. It would be impossible to cover all its intricacies in a single chapter. However, you should already be able to see some of the possibilities that XML offers programmers.
In this hour you learned how to parse XML documents using the XML Parser functions. You explored the DOM objects and methods and learned how to use them to build an XML document. You learned two simple techniques for traversing a DOM structure. You examined an XSL template and learned how to use it with an XSLT processor and DomDocument objects to transform an XML document. Finally, you encountered SimpleXML, a promising but incomplete addition to the PHP XML user's toolkit.