function ip() 
{
if (!empty($_SERVER['HTTP_CLIENT_IP']))
 {
$ip    = $_SERVER['HTTP_CLIENT_IP'];
 } 
elseif (!empty($_SERVER['HTTP_X_FORWARDED_FOR']))
{
$ip    = $_SERVER['HTTP_X_FORWARDED_FOR'];
 } 
else{$ip    = $_SERVER['REMOTE_ADDR'];
 } 
return $ip; 
}