<?
header("Expires: Mon, 26 Jul 1997 05:00:00 GMT");    // Date in the past
header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
                                                     // always modified
header("Cache-Control: no-store, no-cache, must-revalidate");  // HTTP/1.1
header("Cache-Control: post-check=0, pre-check=0", false);
header("Pragma: no-cache");                          // HTTP/1.0
// -----------------------------------
// includo il file di configurazione
// -----------------------------------
include_once ('config.inc.php');
// ------------------------------------
// Controllo quanti utenti sono online
// ------------------------------------
$time_start = getmicrotime();
$query = "SELECT user_name FROM $user WHERE ($time_start - user_date) < $active";
$sql = mysql_query($query,$db) or die("output=false");
$total_users = mysql_num_rows($sql);
if($total_users >= $max_users)
{
   die("output=false"); // access denied
}
// ------------------------
// Fornisco uno unique id
// ------------------------
if(isset($submit) && isset($HTTP_GET_VARS['username']))

{
   $uid = md5(uniqid(microtime(), 1)) . getmypid();
   $username = $HTTP_GET_VARS['username'];
   $query = "INSERT INTO $user (user_id,user_name,user_date) VALUES ('$uid','$username','$time_start')";
   if($sql = mysql_query($query,$db))
   {
      print "uniqid=$uid";
   } else {
      print "output=false";
   }
}
?>