PHP Cookbook
David Sklar, Adam Trachtenberg
PHP Cookbook is the ideal book for when you're stumped on a "how-to" situation in PHP. This book is also a valuble resource for the generally curious programmer, interested in expanding their knowledge on PHP.
This book is basically a list of scenarios coupled with code, and explanations about the functions included. It is also a great resource over PHP.net, and I just like having a physical reference =oP.
I reccomend this to any PHP programmer who hasn't mastered the language, so that they may learn functionality and better structuring.
Great deal at $27.87 too! =o]