function get_ip_address() {
$ip_address = '';
if (getenv('HTTP_CLIENT_IP'))
$ip_address = getenv('HTTP_CLIENT_IP');
else if(getenv('HTTP_X_FORWARDED_FOR'))
$ip_address = getenv('HTTP_X_FORWARDED_FOR');
else if(getenv('HTTP_X_FORWARDED'))
$ip_address = getenv('HTTP_X_FORWARDED');
else if(getenv('HTTP_FORWARDED_FOR'))
$ip_address = getenv('HTTP_FORWARDED_FOR');
else if(getenv('HTTP_FORWARDED'))
$ip_address = getenv('HTTP_FORWARDED');
else if(getenv('REMOTE_ADDR'))
$ip_address = getenv('REMOTE_ADDR');
else
$ip_address = 'UNKNOWN';
return $ip_address;
}