Chapters two and three start the book with good examples of SAX and DOM use in PHP respectively. This provides a solid foundation for the rest of the book which shows examples of popular XML based technologies as applied to PHP. These include XSLT (Sablotron), XML-RPC, SOAP, XML in databases and other topics. Each of these discussions contains some real world examples to provide context.

It's a short and concise book that is well written. The use of graphics could be more effective. For example the screenshot in figure 6.8 is a single line in a vast sea of whtie browser space. The code sample could use some annotation or at the very least some bolding to hi-light the important segments.

The value of this book will depend on the degree to which you use XML in the PHP context. If you want a quick booster rocket to get you into SAX or DOM work within PHP this book will do the trick since it's far better than the documentation on the PHP site.