<?php
include $_SERVER['DOCUMENT_ROOT'] . '/nemendur/nafn/PDO/db_skjal';
try {
    $sql = "SELECT user_id FROM users WHERE UPPER(email) = UPPER(:email) AND token = :token";
    $s = $pdo->prepare($sql);
    $s->bindValue(':email', $_SESSION['email']);
    $s->bindValue(':token', $_SESSION['token']);
    $s->execute();
}
catch (PDOException $e) {
    $error = 'Error fetching usernames list.' . $e->getMessage();
    include  'error.html.php';
    exit();
}

list($userID) = $s->fetch();
if (!$userID) {
    header('Location: example.org');
}
?>