Package::merge

static function merge($res, $res2)
{
	$res = is_array($res) ? $res : array();
	$res2 = is_array($res2) ? $res2 : array();
	foreach ($res2 as $key => $val)
	{
		if (array_key_exists($key, $res) && is_array($val))
			$res[$key] = self::merge($res[$key], $val);
		else
			$res[$key] = $val;
	}
	return $res;
}