<?php 
function GetIP(){ 
    if(getenv("HTTP_CLIENT_IP")) { 
        $ip = getenv("HTTP_CLIENT_IP"); 
    } elseif(getenv("HTTP_X_FORWARDED_FOR")) { 
        $ip = getenv("HTTP_X_FORWARDED_FOR"); 
        if (strstr($ip, ',')) { 
            $tmp = explode (',', $ip); 
            $ip = trim($tmp[0]); 
        } 
    } else { 
        $ip = getenv("REMOTE_ADDR"); 
    } 
    return $ip; 
} 
?>

<?php 
$kimlik = GetIP(); 
echo $kimlik; 
?>