if ($serverret->isSuccess()) {
$separator = strpos($target_url, '?') ? '&' : '?';
$target_url .= $separator . 'zrl=' . urlencode($visitor) . '&addr=' . urlencode($contact_url);
if ($serverret->isSuccess()) {
$separator = strpos($target_url, '?') ? '&' : '?';
$target_url .= $separator . 'zrl=' . urlencode($visitor) . '&addr=' . urlencode($contact_url);