visiting guest [gasten online op jouw page]

<?
/* Config MySQL */ 
$mysql_host = "localhost"; 
$mysql_user = "gooiman"; 
$mysql_pwd  = "idegooi"; 
$mysql_db   = "online"; 
$mysql_port = 3306;  
$max_time   = 600;   

/* AFBLIJVEN */ 
$db = @mysql_connect($mysql_host . ":" . $mysql_port,$mysql_user,$mysql_pwd) 
        or die ("Could not connect to MySQL server!"); 
mysql_select_db($mysql_db,$db) 
        or die ("Could not select database " . $mysql_db); 
$tables_result = mysql_list_tables($mysql_db); 
$TABLE_EXISTS = FALSE; 
for ($c = 0; $c < mysql_num_rows($tables_result); $c++) 
  if (mysql_tablename($tables_result,$c) == "users_online") { $TABLE_EXISTS = TRUE; } 
if (!$TABLE_EXISTS) 
  mysql_query("CREATE TABLE users_online (id INT NOT NULL auto_increment PRIMARY KEY, sess_id VARCHAR(100), time DATETIME)",$db); 
session_start(); 
$id = session_id(); 
$query = mysql_query("SELECT * FROM users_online WHERE sess_id = '$id'",$db); 
if (mysql_affected_rows() > 0) 
  mysql_query("UPDATE users_online SET time = now() WHERE sess_id = '$id'",$db); 
else 
  mysql_query("INSERT INTO users_online VALUES(0,'$id',now())",$db); 
$now = date("U") - $max_time; // $now = UNIX timestamp - $max_time 
$now = date("Y-m-d H:i:s",$now); 
mysql_query("DELETE FROM users_online WHERE time < '$now'",$db); 
$count_query = mysql_query("SELECT COUNT(*) as TOTAL FROM users_online",$db); 
$user_count  = mysql_result($count_query,0,"TOTAL"); 
?>

 <? print $user_count ?> bezoeker(s) online