Chapter 10. Working with User Sessions
PHP contains numerous functions for managing user sessions, which can be stored in the $_SESSION superglobal. Sessions use techniques built into the PHP language, making the act of saving state as easy as calling a function.
In this chapter, you will learn
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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