private function getClientIP()
{
if (isset($_SERVER['HTTP_X_FORWARDED_FOR']) && $_SERVER['HTTP_X_FORWARDED_FOR']) {
$clientIpAddress = $_SERVER['HTTP_X_FORWARDED_FOR'];
} elseif (isset($_SERVER['REMOTE_ADDR']) && $_SERVER['REMOTE_ADDR']) {
$clientIpAddress = $_SERVER['REMOTE_ADDR'];
} else {
$clientIpAddress = '';
}
return $clientIpAddress;
}