CSS The Missing Manual by David McFarland is a good start.

http://www.amazon.com/CSS-Missing-David-Sawyer-McFarland/dp/...

I use the internet for most things, simple searches are the best place to start e.g. "php turorials" etc

If you want a book, The Missing Manual series are a great resource, I refer to my copy of this all the time: http://www.amazon.co.uk/CSS-Missing-Manual-Manuals/dp/059680...