As PHP has grown and evolved through the years, one of the great concepts that has become a standard is the superglobals - that special set of variables that are always defined and get to do all sorts of special things. Well, if those variables have been giving you headaches, maybe it's time you checked out this new article from PHPBuilder.com that covers some of the fundamentals of the PHP superglobals.

This month's article is aimed at PHP developers who're not yet familiar with the PHP superglobals. Usage of superglobals is fundamental to PHP web development, but, with all the recent changes in PHP, there are still many outdated tutorials, books, and sadly, still much confusion.

He goes on to talk about accessing them from PHP and then gets into a lengthy section on what each one contains. Some, like $_GET and $_POST are easy to explain, but when he gets to $_SERVER, he lists out all of the possible values that it might contain...Enjoy!