PHP AJAX CHAT is a simple ajax chat written in PHP and Javascript.  It is meant to be incredibly easy to use and install.  

Here is the install information:

1. Download all files and extract the zip


2. Upload files to FTP server


3. Import database.sql into your Mysql Server


4. Open rpc.php and configure your database information


5. Open index.php and configure your url designation


6. Include index.php anywhere and it will be a chat box for you

This version of chat has a simple text filter to prevent XSS attacks and any type of proglong links etc. 

Only alpha-numeric messages.  You can choose your own nick on the fly or it will generate one for you.  Also everything is written into the CSS for easy editing to include on your site as well.