Good PHP Books and Sites

[Baron]

From what I understand, xenforo makes extensive use of object oriented PHP programming techniques, but most of the work in PHP that I've done to date is procedural. So for the purposes of developing add-ons or other tweaks for Xenforo, I was wondering if anyone has any recommendations on good books or other resources for OO PHP?

 

[-GR-]

It's been a while since I have been over there but sitepoint is one reference I can think of. I used to have a couple php books. One was the php bible but I can remember who wrote it and that was old coding techniques. I would love to get another book and get back in to it.

I was never great at coding but I could at least get stuff done and fix my own problems.