Looking for a Good Book on OOP for PHP

[lilman]

I am looking to master OOP, and looking for an approachable OOP book. I know PHP but would not say I am an advance PHP programmer. I want a basic introductory book that would get me familiar with PHP OOP. Does anyone have any suggestions?

[Hypnos]

OOP had me scratching my head, even after a lot of reading. But once you start using it, it clicks.

All the books I have explain the basics of classes in about 2 pages. If you try to just keep reading past that without understanding the basics and actually using it, you will only find yourself confused.

PHP Freaks has a tutorial on it, which is good at explaining it, but I don't think the examples are very good.
http://www.phpfreaks.com/tutorials/48/0.php

To answer your question though, out of my books, I like the OOP chapter in "Advanced PHP Programming" by George Schlossnagle. The examples are easy to understand, yet they don't skimp on showing what classes really do.
http://www.amazon.com/Advanced-PHP-Programming-George-Schlossnagle/dp/0672325616/sr=8-2/qid=1168111342/ref=sr_1_2/105-0821524-7055609?ie=UTF8&s=books