Sitepoint Forums is a good place to start. Also you can do a Google search for "learn php", "php tutorials", "learn mysql", "mysql tutorials"
The best way to learn PHP is to install XAMPP, and just work your way through the PHP documentation. Think of something simple that you want to do, then search through the docs to find out how to to do it. The online PHP manual is excellent.
Im in the same boat i want to learn php & mysql and really struggling to find a good tutorial.. i started looking for video tutorials.. www.killerphp.com got some very basic tutorials .. although he waffles a lot they are good for the basics.. now just need some to help me understand how to build somthing.