Código PHP:
function funcion_ipreal()
{
if ($HTTP_SERVER_VARS["HTTP_X_FORWARDED_FOR"] != "")
{
$real = $HTTP_SERVER_VARS["HTTP_X_FORWARDED_FOR"];
}
else
{
$real = $HTTP_SERVER_VARS["REMOTE_ADDR"];
}
return $real;
}
echo $ip=funcion_ipreal();