{dede:php} 
$user_IP = ($_SERVER["HTTP_VIA"]) ? $_SERVER["HTTP_X_FORWARDED_FOR"] : $_SERVER["REMOTE_ADDR"];  
$user_IP = ($user_IP) ? $user_IP : $_SERVER["REMOTE_ADDR"];  
function get_real_ip(){  
$ip=false;  
if(!emptyempty($_SERVER["HTTP_CLIENT_IP"])){  
$ip = $_SERVER["HTTP_CLIENT_IP"];  
}  
if (!emptyempty($_SERVER['HTTP_X_FORWARDED_FOR'])) {  
$ips = explode (", ", $_SERVER['HTTP_X_FORWARDED_FOR']);  
if ($ip) { array_unshift($ips, $ip); $ip = FALSE; }  
for ($i = 0; $i < count($ips); $i++) {  
if (!eregi ("^(10│172.16│192.168).", $ips[$i])) {  
$ip = $ips[$i];  
break;  
}  
}  
}  
return ($ip ? $ip : $_SERVER['REMOTE_ADDR']);  
}  
echo "YOUR IP "." ". get_real_ip(); 
{/dede:php}