All this talk on this board about using PHP to write web-based games has finally converted me. I am now picking out some books to read on the topic (I know there are probably thousands of tutorials on the internet, but what can I say, I like books

), and I am noticing something. They all seem to play down OOP. Most of them either save the OOP discussion until waaay down the line of the book, or they don't discuss it at all.
How important is OOP to PHP? I am an experienced programmer, but almost all my experience is with strictly OOP languages. The last time I used a procedural language, I was a kid and did not have a very good grip on programming at all. Are most PHP scripts written in a procedural paradigm?