user online errore

[rocco.mod]

ciao sto provando un contatore utenti in locale e mi da i segenti errori
perche cosa c e lerrore posto l errore e il codice

Notice: Undefined variable: REMOTE_ADDR in c:\programmi\easyphp1-8\www\actionscript\user.php on line 13

Notice: Undefined variable: PHP_SELF in c:\programmi\easyphp1-8\www\actionscript\user.php on line 13

Notice: Undefined variable: PHP_SELF in c:\programmi\easyphp1-8\www\actionscript\user.php on line 25

<?php

$server = "localhost"; 
$db_user = "root"; 
$db_pass = ""; 
$database = "3333"; 
$timeoutseconds = 300;

$timestamp = time(); 
$timeout = $timestamp-$timeoutseconds;

mysql_connect($server, $db_user, $db_pass); 
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES ('$timestamp','$REMOTE_ADDR','$PHP_SELF')");

if(!($insert)) { 
print "Useronline Insert Failed > "; 
}

$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout"); 

if(!($delete)) { 
print "Useronline Delete Failed > "; 
} 

$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='$PHP_SELF'"); 

if(!($result)) { 
print "Useronline Select Error > "; 
} 

$user = mysql_num_rows($result); 

mysql_close(); 

if($user == 1) { 
print("[b]$user[/b] user onlinen"); 
} else { 
print("[b]$user[/b] users onlinen"); 
} 

?>