Sams Teach Yourself PHP, MySQL and Apache All in One (4th Edition)

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

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