<?php

/**
 * This file is part of the SysCP project.
 * Copyright (c) 2003-2009 the SysCP Team (see authors).
 *
 * For the full copyright and license information, please view the COPYING
 * file that was distributed with this source code. You can also view the
 * COPYING file online at http://files.syscp.org/misc/COPYING.txt
 *
 * @copyright  (c) the authors
 * @author     Florian Lippert <flo@syscp.org>
 * @license    GPLv2 http://files.syscp.org/misc/COPYING.txt
 * @package    Functions
 * @version    $Id: function.validateDomain.php 2724 2009-06-07 14:18:02Z flo $
 */

/**
 * Check if the submitted string is a valid domainname, i.e.
 * it consists only of the following characters ([a-z0-9][a-z0-9\-]+\.)+[a-z]{2,4}
 *
 * @param string The domainname which should be checked.
 * @return boolean True if the domain is valid, false otherwise
 * @author Florian Lippert <flo@syscp.org>
 * @author Michael Duergner
 *
 */

function validateDomain($domainname)
{
	// we add http:// because this makes a domain valid for the filter;

	$domainname_tmp = 'http://' . $domainname;

	// If FILTER_VALIDATE_URL is good, but FILTER_VALIDATE_URL with FILTER_FLAG_PATH_REQUIRED or FILTER_FLAG_QUERY_REQUIRED is also good, it isn't just a domain.
	// This is a ugly hack, maybe a good regex would be better?

	if(filter_var($domainname_tmp, FILTER_VALIDATE_URL) !== false && filter_var($domainname_tmp, FILTER_VALIDATE_URL, FILTER_FLAG_PATH_REQUIRED) === false && filter_var($domainname_tmp, FILTER_VALIDATE_URL, FILTER_FLAG_QUERY_REQUIRED) === false)
	{
		return $domainname;
	}
	else
	{
		return false;
	}
}