This tutorial teaches you how a create a Twitter style of Follow and Un-follow Application with the help of Ajax, Jquery and PHP.
A user of Vasplus Programming Blog requested that we should improve our existing or old Follow and Un-follow Application to use sessions for users identification instead of the old style that uses the IP Addresses of the users to identify them.
This is a very simple to understand application that gives you the basics of how to implement this kind of systems with good programming code comments to ease usability.