function detect real ip (updated)

[GumSlone]

is this will work on ngix wid mini opera nd proxies ??
and last subnet 0 ?? isnt it wil return 0 in the last of all ip's ??

yes it will return the last 0 for all ips,
and it should work with nginx and opera and other proxies, this it the latest function which i am using on my sites,
well,
if you dont want to have the last number in ip =0;
you can simply replace :

    list($ip1,$ip2,$ip3,$ip4) = explode('.',$ip); 
    return $ip1.'.'.$ip2.'.'.$ip3.'.0'; //REAL IP 

by

return $ip; 

also if you dont use apache's mod_geo_ip for ip to coutry detection its better to set last ip value to zero and cache the result of geo ip detection for this ip eg. with memcached, this will reduce the server load.

[Anshul]

function gum_real_ip()
{

    $keyname_ip_arr = array('HTTP_X_FORWARDED_FOR', 'HTTP_REMOTE_ADDR_REAL', 'HTTP_CLIENT_IP', 'HTTP_X_REAL_IP', 'REMOTE_ADDR');
    foreach ($keyname_ip_arr as $keyname_ip) {
        if (!empty($_SERVER[$keyname_ip])) {
            $ip = urlencode($_SERVER[$keyname_ip]);
            break;
        }
    }
    if (strstr($ip, ',')) {
        $ips = explode(',', $ip);
        $ip = $ips[0];
    }
    if(empty($ip)) $ip = $_SERVER["REMOTE_ADDR"];
    
    list($ip1,$ip2,$ip3,$ip4) = explode('.',$ip);
    return $ip1.'.'.$ip2.'.'.$ip3.'.0'; //REAL IP
} 

is this will work on ngix wid mini opera nd proxies ??
and last subnet 0 ?? isnt it wil return 0 in the last of all ip's ??

[GumSlone]

function gum_real_ip()
{
     $keyname_ip_arr = array('HTTP_X_FORWARDED_FOR', 'HTTP_REMOTE_ADDR_REAL', 'HTTP_CLIENT_IP', 'HTTP_X_REAL_IP', 'REMOTE_ADDR');
    foreach ($keyname_ip_arr as $keyname_ip) {
  if (!empty($_SERVER[$keyname_ip])) {
   $ip = $_SERVER[$keyname_ip];
   if (strstr($ip, ',')) {
    $ips = explode(',', $ip);
    foreach ($ips as $ip)
    {
      if(filter_var(trim($ip), FILTER_VALIDATE_IP, FILTER_FLAG_NO_PRIV_RANGE)) break(2);
    }
   }
   elseif(filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_NO_PRIV_RANGE)) break;
  }
    }
    return $ip;
    list($ip1,$ip2,$ip3,$ip4) = explode('.',$ip);
    return $ip1.'.'.$ip2.'.'.$ip3.'.0'; //REAL IP
}