On the PHPMaster.com site today, there's a good introduction to a basic data type in PHP - working with arrays. This tutorial is a low level look at what arrays are and how to work with them (briefly).

Tables organize data in such a way that we can easily find correlations or perform straightforward computations. A array is essentially a way to organize data in a table-like manner. The name “array” comes from the same Latin roots as the word “arrangement.”

If you're anything other than completely new to the language, this post won't help you much. If you're new to programming, though, learning about arrays in PHP is key to your budding development skills. For more in-depth looks at using arrays, checkout these results.