I bought this book when I was just getting started on a website for my neighborhood, and although I am an experienced developer with knowledge of ASP, JSP and SQL, I had not personally worked with PHP or MySQL before.
In less than a month's time, using only this book and the PHP language reference (included with PHP) I was able to build a website with user logon, discussion forums, user-customizable profiles with the option to upload pictures of themselves, and online web email. I wrote all of this from scratch, using the examples from this book, and this book alone.
For those of you who are learning to develop "live" (ie. non-static HTML) websites, and you've chosen to use only open-standards technology to do so, I can't imagine a better book to assist you than this one. It does a fantastic job of explaining things in simple terms, and provides a very good overview of PHP and MySQL, covering the subject matter clearly and concisely, without a lot of additional, unnecessary verbage.
I was originally going to develop my website using JSPs, but learned that my ISP did not support JSPs, only Java servlets (!), so I was forced to look at PHP as a faster, easier way of developing the site. It has been an exciting learning experience, thanks mostly to this book. The book is worth the price, and then some.