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function get_ip()
{
$ipaddr = "Unknown";
if ($HTTP_SERVER_VARS["HTTP_X_FORWARDED_FOR"]) {
$ipaddr = $HTTP_SERVER_VARS["HTTP_X_FORWARDED_FOR"];
} elseif ($HTTP_SERVER_VARS["HTTP_CLIENT_IP"]) {
$ipaddr = $HTTP_SERVER_VARS["HTTP_CLIENT_IP"];
} elseif ($HTTP_SERVER_VARS["REMOTE_ADDR"]) {
$ipaddr = $HTTP_SERVER_VARS["REMOTE_ADDR"];
} elseif (getenv("HTTP_X_FORWARDED_FOR")) {
$ipaddr = getenv("HTTP_X_FORWARDED_FOR");
} elseif (getenv("HTTP_CLIENT_IP")) {
$ipaddr = getenv("HTTP_CLIENT_IP");
} elseif (getenv("REMOTE_ADDR")) {
$ipaddr = getenv("REMOTE_ADDR");
}
return $ipaddr;
}