PHP resources

I have been spending a little bit of time trying to learn PHP. Now in my masters courses we have to learn PHP so I am speeding up the process. I have been using the tutorials on w3schools.com for PHP. They are great and there is even a quiz at the end, http://w3schools.com/php/php_quiz.asp. I struggled through my algorithms course last semester so I wanted to pay particular attention to loops etc in PHP.

On the W3schools site there are 2 great reference pages. One page lists all of the PHP array functions. Each item in the list is a link. click on the link to see concrete examples of that array function in action. Here is the link, http://w3schools.com/php/php_ref_array.asp

The second page that is very useful is a listing of all the functions. PHP has 700 built in functions, that means for many things you don’t have to write your own, although of course you can and maybe should depending on the context of your work. Once again, click on any item in the list to see it in action. Here is the link, http://w3schools.com/php/default.asp

I have a feeling I will be coming back to these pages a lot in the next few months in regards to my courses. What other PHP resources do you use?