Chapter 12. Working with Cookies and User Sessions

PHP contains numerous functions for managing and keeping track of user information, including both simple cookies and all-encompassing user sessions. Sessions use techniques built into the PHP language, making the act of saving state as easy as referencing a super-global variable.

In this chapter, you will learn

• How to store and retrieve cookie information

• What session variables are and how they work

• How to start or resume a session

• How to store variables in a session

• How to destroy a session

• How to unset session variables