What are the consequences of not properly starting a session on the logout page in PHP?

If a session is not properly started on the logout page in PHP, it may lead to session variables not being unset or destroyed, leaving the user potentially still logged in. To solve this issue, make sure to start the session on the logout page and then unset or destroy any session variables as needed. 

<?php
session_start();

// unset or destroy session variables
$_SESSION = array();
session_destroy();

// redirect user to login page
header("Location: login.php");
exit;
?>

Keywords

session_start session_destroy session_unset PHP logout page

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