PHP References (O'Reilly)
In my last article, I wrapped up my discussion of using objects in PHP. This week I'll be changing gears a little bit and discussing one of the more elusive aspects of PHP -- references. For those of you with a C programming background (although they are fundamentally different), references serve the same purpose as a C-style pointer. For those of you without programming experience in C, don't worry! I'll be covering everything you'll need to know today."