SimpleMachines / SMF2.1

	if ($xml_format == 'rss' || $xml_format == 'rss2')

	{

		if ($xml_format == 'rss2')

			foreach ($_REQUEST as $var => $val)

				if (in_array($var, array('action', 'sa', 'type', 'board', 'boards', 'c', 'u', 'limit')))

					$url_parts[] = $var . '=' . (is_array($val) ? implode(',', $val) : $val);

		// Start with an RSS 2.0 header.

		echo '

	}

	elseif ($xml_format == 'atom')

	{

		foreach ($_REQUEST as $var => $val)

			if (in_array($var, array('action', 'sa', 'type', 'board', 'boards', 'c', 'u', 'limit')))

				$url_parts[] = $var . '=' . (is_array($val) ? implode(',', $val) : $val);

		echo '

<feed', $ns_string, '>