Getting real IP address in PHP

Fungsi untuk mendapatkan IP Adres client yang sebenarnya
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function getRealIpAddr()
{
if (!empty($_SERVER['HTTP_CLIENT_IP'])) //check ip from share internet
{
$ip=$_SERVER['HTTP_CLIENT_IP'];
}
elseif (!empty($_SERVER['HTTP_X_FORWARDED_FOR'])) //to check ip is pass from proxy
{
$ip=$_SERVER['HTTP_X_FORWARDED_FOR'];
}
else
{
$ip=$_SERVER['REMOTE_ADDR'];
}
return $ip;
}
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sudah di coba dan memang ampuh.

http://roshanbh.com.np/2007/12/getting-real-ip-address-in-php.html