dolibarr/htdocs/public/theme/index.php

<?php
/* Copyright (C) 2009 Laurent Destailleur  <eldy@users.sourceforge.net>
 * Copyright (C) 2015 Raphaël Doursenaud   <rdoursenaud@gpcsolutions.fr>
 *
 * 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 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <https://www.gnu.org/licenses/>.
 */

/**
 *     	\file       htdocs/public/theme/index.php
 *		\ingroup    core
 *		\brief      A redirect page to an error
 */

require '../../master.inc.php';

header("Location: ".DOL_URL_ROOT.'/public/error-404.php');