online users

[Anon]

hi im trying to get the users that are online on my site and their IP address (so i can know how many Guests there are online).

this is the Script i use

---

if (getenv(HTTP_X_FORWARDED_FOR)){
$ip=getenv(HTTP_X_FORWARDED_FOR);
}
else {
$ip=getenv(REMOTE_ADDR);
}

$query="SELECT user FROM mundo_online WHERE user='$user' AND ip_address='$ip'";
$online->query($query);

$time=time();

IF($online->num_rows()==0)
{
	$query = "INSERT INTO mundo_online (user, time, ip_address) VALUES ('$user','$time','$ip')";
	$online->query($query); 
}
ELSE
{
	$query = "UPDATE mundo_online SET time='$time' WHERE user='$user' AND ip_address='$ip' ";
	$online->query($query); 
}

$query = "DELETE FROM mundo_online WHERE time <= ($time - 60*10) ";

$online->query($query);

---

That script i loaded everytime a user loads a page. Im not sure i i can get the REAL IP with that sccript or to use

---

if (getenv(HTTP_CLIENT_IP)){
$ip=getenv(HTTP_CLIENT_IP);
}
else {
$ip=getenv(REMOTE_ADDR);
}

---

And i have another big problem.
Some users dont get their IP into the TABLE. So it does 2 inserts, one for the one with the IP and one without the IP, so i looks like there where 2 users online.

Is something wrong on the code or something ? or what is it ?

Thanks !