index.php

<?php
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
// Set the site ID if required.  This must be done before any database
// access is attempted.

if (!empty($_GET['site'])) {
    $site_id = $_GET['site'];
} else if (is_dir("sites/" . $_SERVER['HTTP_HOST'])) {
    $site_id = $_SERVER['HTTP_HOST'];
} else {
    $site_id = 'default';
}

if (empty($site_id) || preg_match('/[^A-Za-z0-9\\-.]/', $site_id)) {
    die("Site ID '".htmlspecialchars($site_id, ENT_NOQUOTES)."' contains invalid characters.");
}

require_once "sites/$site_id/sqlconf.php";

if ($config == 1) {
    header("Location: interface/login/login.php?site=$site_id");
} else {
    header("Location: setup.php?site=$site_id");
}