Destroy PHP session and unset all session variables

PHP Cookies and Sessions: Exercise-6 with Solution

Write a PHP script to destroy a session and unset all session variables.

Sample Solution:

PHP Code :

<?php
session_save_path('i:/custom/');
session_start();

// Unset all session variables
$_SESSION = [];

// Destroy the session
session_destroy();

echo "Session destroyed. All session variables have been unset.";
?>

Sample Output:

Session destroyed. All session variables have been unset.

Explanation:

In the above exercise -

• We start the session using session_start() to initialize the session.
• Use $_SESSION = [] to unset all session variables by assigning an empty array to $_SESSION. This effectively removes all session variables from the session.
• Then call session_destroy() to destroy the session. This deletes the session file on the server and removes the session ID from the client's browser.
• Finally, display a message indicating that the session has been destroyed and all session variables have been unset.

Flowchart:

PHP Code Editor:

Contribute your code and comments through Disqus.

Previous: Retrieve and display a PHP session variable.
Next: Set a secure PHP cookie for an encrypted connection.