You're on the best site/tutorial section there is! and the best beginners tutorial/intro is on the manual www.php.net/manual/en/
You could also try
www.devshed.com/
or
www.zend.com
for other tutorials.
Tip:
Don't let the manual scare you, it's actually pretty straight-forward and if you get stuck you can always come back here!
Good luck
Nick
