<?php
session_start();
session_register("SESSION");
if (isset($SESSION)) {
$id=$_SESSION['id'];
$pw=$_SESSION['pass'];
$reqlevel=1;

function checkmemb() {

$query = "Select * from signup where username='$id' And password = '$pw'";
$result = mysql_query($query);

switch ($row = mysql_fetch_array($result)) {

      case ($row["userlevel"] > 0 && $row["userlevel"] < $reqlevel):
      print "Il Tuo Livello di Accesso Non è sufficente, <BR> Tuo livello: $row["userlevel"] <BR>Livello necessario: $reqlevel";
      break;

      case ($row["userlevel"] > 0 && $row["userlevel"] > $reqlevel):
      return true;
      break;

      case (!$id || !$pw):
      print "Non sei loggato";
      break;
               }
        }
    }
?>