I picked this book up after a few weeks of playing around with PHP and MySQL and found it a very good book to get started with. The reason I say this is 4 stars for Dummies is because for the very new people, I think this book is great. It shows you good examples of the basics and enough to get you running in to PHP/MySQL but thats it. It doesn't go in to vast details but I think that is not what this book is about.
To be fair, the bit on installing PHP/MySQL is TERRIBLE. I got SO stuck on this, so my advice, google a tutorial on this, as its very simple, but for some reason, this book makes it complicated, I can do it with my eyes closed now, but back then, this book did me no favours.
Alot of people might slate this book, I can see why, its just not for them, but for me back then it was great. Two big projects to work on at the end, and massive referance at the beggining, good for having at your table when you first start out.