Destroy PHP session and unset all session variables

Last update on April 16 2025 12:56:44 (UTC/GMT +8 hours)

6. Destroy Session and Unset Variables

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:

For more Practice: Solve these Related Problems:

Write a PHP script to destroy the current session and confirm that all session variables have been removed.
Write a PHP function to unset all session variables and then redirect the user to a login page.
Write a PHP program to safely end a session and output a message confirming session termination.
Write a PHP script to clear session data and then check using session_status() to ensure the session is inactive.

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.