private function copyDir($from, $to)
    {
        mkdir($to, 0777, true);
        
        $items = new FilesystemIterator($from);

        foreach ($items as $item)
        {
            $pattern = preg_quote($from, "/");
            $Key = preg_replace("/^{$pattern}/", "", $item);

            $subFrom = strval($item);
            $subTo   = $to.$Key;
            
            if (filetype($item) == 'dir')
            {
                $this->copyDir($subFrom, $subTo);
            } else {
                $this->copyFile($subFrom, $subTo);
            }
        }

        return true;
    }