logout.php

<?php

session_start();

if (ini_get("session.use_cookies")) {
    $params = session_get_cookie_params();
    setcookie(
        session_name(),
        '',
        time() - 42000,
        $params["path"],
        $params["domain"],
        $params["secure"],
        $params["httponly"]
    );
}


if (isset($_SESSION)) {
    unset($_SESSION);
    session_unset();
    session_destroy();
}

header('Location:login.php');
exit();