Chapter23.XML and XHTML

Chapter 23. XML and XHTML

If you have been programming for even a little while, chances are you have heard of XML. It is one of those topics that seems to get people all frothy and is used to pad resumés, tout the technologically advanced nature of a product, or otherwise impress people who are not quite certain exactly what it is.

This chapter seeks to demystify XML, show how to use it in PHP, and take a look at XHTML, a marriage of the best of both XML and HTML. By the end of this chapter, you will have seen

• An introduction to XML and why to use it

• The way to produce XML documents

• Code to manipulate these documents from within PHP5

• An introduction to XHTML and how we will use it in all of our web applications