PHP
Get flash to fully experience Pearltrees
This tutorial was written in 2003, which is truly prehistoric in internet terms. If you're looking to write a modern chat server that works in all browsers, here are a couple considerations: Don't write your own , just adapt an existing one. There are plenty of good free (and bad) ones out there. A quick google search reveals lots of things like this . If you are intent on writing your own, don't follow this guide (unless you are a time traveler from 10 years ago, or a masochist).
Writing a JavaScript/PHP Chat Server | jenChat | jenseng.com