What are common pitfalls when using session_destroy() or session_unset() in PHP?

Common pitfalls when using session_destroy() or session_unset() in PHP include not properly resetting the session variables or not destroying the session completely. To ensure that the session is completely destroyed, it is recommended to unset all session variables and then call session_destroy(). Additionally, it is important to call session_start() before attempting to destroy the session.

session_start();

// Unset all session variables
$_SESSION = array();

// Destroy the session
session_destroy();