鍵值排序祕鑰驗證

一般祕鑰驗證都需要給數組按鍵值正序排序，然後md5,貼出來留作備用

/*
    生成md5摘要
    */
    function params_md5($data, $client_id)
    {
        if($secretkey === FALSE)
            return FALSE;
        foreach ($data as $key => $value) {
            $params[] = $key;
        }
        sort($params);
        $list_params = $this->params_combine($params,$data);
        $list_secrectparams = $client_id.$list_params;
        return strtoupper(md5($list_secrectparams));

    }

/*
    字典序升序算法
    */
    function params_combine($params,$data)
    {
        foreach ($params as $key => $value) {
            $list_params .= $value.$data[$value];
        }
        return $list_params;
    }