Introduction to Cookies and Sessions in PHP
In this video (http://goo.gl/wjpn3E) We have explained complete meaning of cookies and session.
A cookie can contain different data that is stored on the client browser with server specific information like user id and or user preferences. Sessions are used to store information in the form of variables that can be used across different pages on the site. For complete information about cookie and session watch this video. If you have any query regarding cookie and session, you can ask at php developer forum and get answers instantly from the highly experienced community member.