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Sams Teach Yourself PHP, MySQL® and Apache All in One, Second Edition by Julie C. Meloni

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Chapter 11. Working with Cookies and User Sessions

PHP contains numerous functions for managing 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 superglobal.

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

Introducing Cookies

You can use cookies within your PHP scripts to store small bits of information about a user. A cookie is a small amount of data stored by the user’s browser in compliance with ...

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