$mdb2 = getConnection();
$sql = "select param_value from tt_site_config where param_name = 'max_users'";
$res = $mdb2->query($sql);
$mdb2 = getConnection();
$sql = "select param_value from tt_site_config where param_name = 'max_users'";
$res = $mdb2->query($sql);