php - 空值被插入数据库

Question

我有一个 REST API，它应该将 JSON 的内容保存到 MySQL 数据库中。但是它将所有内容插入为空？这很奇怪，因为每当从 swift SDK 发送 JSON 时，它都能正常工作。

 public function saveTracking($request, $response, $args) {
        if(!$this->validToken($response)) {
            return $response;
        }
        $data = $request->getParsedBody();
        $tracking_data = json_decode(json_encode($data['tracking']), FALSE);
        $total_records = 0;
          //error_log(print_r($tracking_data, true));

        foreach($tracking_data as $key => $value) {
            $tracking = new EstablishmentTracking();
            $tracking->mobile_user_id = $this->authUser->id;
            $tracking->report_date = $value->report_date;
            $tracking->establishment_id = $value->establishment_id;
            if ($value->platform == MobileUser::ANDROID || $value->platform == MobileUser::IOS) {
                $tracking->platform = $value->platform;
            }
            $tracking->purchase_id = $value->purchase_id;

            error_log(print_r($tracking, true));
            $this->establishmentService->saveEstablishmentTracking($tracking);
            $total_records++;
        }
        $arr = array("status" => "ok"
                    ,"total_records" => $total_records
                    );
        print_r($arr);
        $newResponse = $response->withJson($arr);
        return $newResponse;
    }

添加一行打印变量内容后，我得到以下内容:

stdClass Object
(
    [establishment_id] => 39
    [report_date] => 2018-05-31 18:45:05
    [platform] => android
    [purchase_id] => 0

它是否没有将 JSON 作为数组正确发送？问题出在哪里？

Answer 1

我假设导致问题的 json 对象是 $tracking_data ，您正在使用的 json 解码需要具有从 false 到 true 的第二个值，这会将其转换为可使用键 stdClass 进行迭代的 php 数组，可能不会显示其属性