Stash::shuffle_list_key PHP Method

    public function shuffle_list_key($arr, $key)
    {
        $key_list = array();
        // shuffle the key array
        foreach ($arr as $row) {
            if (isset($row[$key])) {
                $key_list[] = $row[$key];
            }
        }
        shuffle($key_list);
        // rebuld the list with the shuffled key
        $i = 0;
        foreach ($arr as &$row) {
            if (isset($key_list[$i])) {
                $row[$key] = $key_list[$i];
            }
            ++$i;
        }
        unset($row);
        return $arr;
    }