PHP - Sessions

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To store information about, or change settings for a user session. Session variables hold information about one single user, and are available to all pages in one application.
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Starting a PHP Session

*NOTE: The session_start() function must appear BEFORE the html tag:



Storing a Session Variable


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The Output: Pageviews=1
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In the example below, we create a simple page-views counter. The isset() function checks if the "views" variable has already been set. If "views" has been set, we can increment our counter. If "views" doesn't exist, we create a "views" variable, and set it to 1:



Destroying a Session

If you wish to delete some session data, you can use the unset() or the session_destroy() function.

The unset() function is used to free the specified session variable:


Or you can also COMPLETELY destroy the session by calling the session_destroy() function:


*NOTE: session_destroy() will reset your session and you will lose all your stored session data.