Tutorials, whenever I needed one I just google it of course I google for them based on the function I need so my search will look like "php mysql_fetch_array" which returns things on working with MySQL.

But the best resource is the php.net website. This is the home of PHP you can look up any function and get examples as well as there is tons of user comments with examples. If you have to go beyond their site for info on functions or doing something you may as well post in these forums as anything else out there is not going to be much more in depth that what they have.