I did something by my self, but this could only be temporary:
$sql = "SELECT user_id, image_id, image_date FROM ".IMAGES_TABLE." WHERE user_id=".$user_info['user_id']." ORDER BY image_date DESC LIMIT 1";
$result = $site_db->query($sql);
$row = $site_db->fetch_array($result);
$image_new = ($row['image_id']);
header("Location: details.php?image_id=".$image_id."");
exit;