抖音小程序担保支付（php + uniapp）

// 支付
public function ttpay(data)
    {url = 'https://developer.toutiao.com/api/apps/ecpay/v1/create_order';
        params['app_id'] = '你的小程序appid';params['out_order_no'] = (string)data['no'];params['total_amount'] = (int)data['amount'] * 100;params['subject'] = 'subject';
        params['body'] = 'body';params['valid_time'] = 3600;
        params['sign'] =this->ttsign(params);http = this->httpPost(url, params);
        return json_decode(http,true);
    }

    //curl 
public function httpPost(url,data = null)
    {
        curl = curl_init();
        curl_setopt(curl, CURLOPT_URL, url);
        curl_setopt(curl, CURLOPT_SSL_VERIFYPEER, false);
        curl_setopt(curl, CURLOPT_SSL_VERIFYHOST, false);
        if (!data) return false;
        if (is_array(data)) {data = json_encode(data);
        }
        curl_setopt(curl, CURLOPT_POST, 1);
        curl_setopt(curl, CURLOPT_POSTFIELDS,data);
        curl_setopt(curl, CURLOPT_HEADER, 0);
        curl_setopt(curl, CURLOPT_HTTPHEADER, array(
            'Content-Type: application/json; charset=utf-8',
            'Content-Length:' . strlen(data),
            'Cache-Control: no-cache',
            'Pragma: no-cache'
        ));
        curl_setopt(curl, CURLOPT_RETURNTRANSFER, 1);
        res = curl_exec(curl);
        curl_close(curl);
        returnres;
    }
// 签名
public function ttsign(params)
    {rList = array();
        foreach (params ask => v) {
            if (k == "other_settle_params" || k == "app_id" ||k == "sign" || k == "thirdparty_id")
                continue;value = trim(strval(v));len = strlen(value);
            if (len > 1 && substr(value, 0, 1) == "\"" && substr(value, len,len - 1) == "\"")
                value = substr(value, 1, len - 1);value = trim(value);
            if (value == "" || value == "null")
                continue;
            array_push(rList, value);
        }
        array_push(rList, "fregSFjXnAaSZmc02UGxLJWeDv9AX02F7YFxpji9");
        sort(rList, 2);
        return md5(implode('&',rList));
    }

//ps: 请求 ttpay() 方法， 抖音文档真垃圾，返回错误参数不明确，各位踩坑的码友注意传递参数类型

//前端代码
tt.pay({
  orderInfo: {
    order_id: "6819903302604491021",
    order_token:
      "CgsIARCABRgBIAQoARJOCkx+WgXqCUIwTel2V3siEGZ0++poigIM+SMMxtMx798Vj0ZYzoTYBqeNslodUC9X5KAOHkR1YbSBz6I6pXATh5faIGy7R72A9vwm0OczGgA=",
  },
  service: 5,
  success(res) {
    if (res.code == 0) {
      // 支付成功处理逻辑，只有res.code=0时，才表示支付成功
      // 但是最终状态要以商户后端结果为准
    }
  },
  fail(res) {
    // 调起收银台失败处理逻辑
  },
});