if (strpos($old, $dm)) {
$old_name = substr($old, strrpos($old, $dm)+1, strlen($old));
$old_parent = substr($old, 0, strrpos($old, $dm));
if (strpos($old, $dm)) {
$old_name = substr($old, strrpos($old, $dm)+1, strlen($old));
$old_parent = substr($old, 0, strrpos($old, $dm));