It's all in the manual:
http://www.php.net/manual/en/

If you want something more like ASP.NET, start with a decent
framework:
http://www.achievo.org/atk

(atk is up higher than .net in that it is all codebehinds, so to
speak. apart from the themes, there are no "pages" with tags in them
to worry about. that said, embedded smarty, scriptaculous, fckedit)