I think that's a superb book for helping you to grasp OOP concepts, though it may take more than one read for some of it to soak in. 🙂
If you want lots of code, you could look at PHP 5 Social Networking by Michael Pea**** (my review). It does not cover many of the things in Zandstra's book, but it does provide a good example of how you can build a fairly major project with object-oriented PHP.
PS: Geez, I think this forum's profanity filter is perhaps a bit over-zealous? :rolleyes: