Where do I start with PHP

So where do I start with PHP.

I went to google, typed in 'php', and clicked on the first link that came up (http://www.php.net/).

Clicked on introductory tutorial, and did a few of the things from the introductory tutorial. Now you may e asking what I ran this stuff on. I still have my linux box that I built, with Mandrake 10.1 installed, and apache, php, mysql all are included in the install.