从Json API端点获取数据并将数据保存在数组中。 基本上根据从API回调接收的Json数据创建变量

Question

I am trying to fetch data from an api, saving the data into variables which i plan to finally save in the database. The problem is that the project is throwing errors which i have not been able to solve.

This code is for PHP and JSON. I am working on an online payment system and i want to save the data received from callbacks into my database. However, i am not able to do this because the data received in JSON format, is proving to be a headache extracting it.

Here is the PHP code of how i am extracting the variables:

$amount=$callbackData->Body->CallbackMetadata->Item[0]->Value; $mpesaReceiptNumber=$callbackData->Body->stkCallback->CallbackMetadata->Item[1]->Value; $balance=$callbackData->Body->stkCallback->CallbackMetadata->Item[2]->Value; $b2CUtilityAccountAvailableFunds=$callbackData->Body->stkCallback->CallbackMetadata->Item[3]->Value; $transactionDate=$callbackData->Body->stkCallback->CallbackMetadata->Item[4]->Value; $phoneNumber=$callbackData->Body->stkCallback->CallbackMetadata->Item[5]->Value;

Here is the JSON Data:

{  

"Body":{
"stkCallback":{
"MerchantRequestID":"22571-1918158-1", "CheckoutRequestID":"ws_CO_DMZ_357840864_13022019182443436", "ResultCode":0, "ResultDesc":"The service request is processed successfully.", "CallbackMetadata":{
"Item":[
{
"Name":"Amount", "Value":1.00 }, {
"Name":"MpesaReceiptNumber", "Value":"NBD5TUW3AV" }, {
"Name":"Balance" }, {
"Name":"TransactionDate", "Value":20190213182502 }, {
"Name":"PhoneNumber", "Value":254727304011 } ] } } } }

Here is the error I am getting:

[13-Feb-2019 14:46:07 Europe/London] PHP Notice: Undefined property: stdClass::$CallbackMetadata in /home/vinemupw/public_html/project/callbacks/stkcallback.php on line 25 [13-Feb-2019 14:46:07 Europe/London] PHP Notice: Trying to get property 'Item' of non-object in /home/vinemupw/public_html/project/callbacks/stkcallback.php on line 25 [13-Feb-2019 14:46:07 Europe/London] PHP Notice: Trying to get property 'Value' of non-object in /home/vinemupw/public_html/project/callbacks/stkcallback.php on line 25 [13-Feb-2019 14:46:07 Europe/London] PHP Notice: Undefined property: stdClass::$CallbackMetadata in /home/vinemupw/public_html/project/callbacks/stkcallback.php on line 26 [13-Feb-2019 14:46:07 Europe/London] PHP Notice: Trying to get property 'Item' of non-object in /home/vinemupw/public_html/project/callbacks/stkcallback.php on line 26 [13-Feb-2019 14:46:07 Europe/London] PHP Notice: Trying to get property 'Value' of non-object in /home/vinemupw/public_html/project/callbacks/stkcallba ck.php on line 26 [13-Feb-2019 14:46:07 Europe/London] PHP Notice: Undefined property: stdClass::$CallbackMetadata in /home/vinemupw/public_html/project/callbacks/stkcallback.php on line 27 [13-Feb-2019 14:46:07 Europe/London] PHP Notice: Trying to get property 'Item' of non-object in /home/vinemupw/public_html/project/callbacks/stkcallback.php on line 27 [13-Feb-2019 14:46:07 Europe/London] PHP Notice: Trying to get property 'Value' of non-object in /home/vinemupw/public_html/project/callbacks/stkcallback.php on line 27 [13-Feb-2019 14:46:07 Europe/London] PHP Notice: Undefined property: stdClass::$CallbackMetadata in /home/vinemupw/public_html/project/callbacks/stkcallback.php on line 28 [13-Feb-2019 14:46:07 Europe/London] PHP Notice: Trying to get property 'Item' of non-object in /home/vinemupw/public_html/project/callbacks/stkcallback.php on line 28 [13-Feb-2019 14:46:07 Europe/London] PHP Notice: Trying to get property 'Value' of non-object in /home/vinemupw/public_html/project/c allbacks/stkcallback.php on line 28 [13-Feb-2019 14:46:07 Europe/London] PHP Notice: Undefined property: stdClass::$CallbackMetadata in /home/vinemupw/public_html/project/callbacks/stkcallback.php on line 29 [13-Feb-2019 14:46:07 Europe/London] PHP Notice: Trying to get property 'Item' of non-object in /home/vinemupw/public_html/project/callbacks/stkcallback.php on line 29 [13-Feb-2019 14:46:07 Europe/London] PHP Notice: Trying to get property 'Value' of non-object in /home/vinemupw/public_html/project/callbacks/stkcallback.php on line 29 [13-Feb-2019 14:46:07 Europe/London] PHP Notice: Undefined property: stdClass::$CallbackMetadata in /home/vinemupw/public_html/project/callbacks/stkcallback.php on line 30 [13-Feb-2019 14:46:07 Europe/London] PHP Notice: Trying to get property 'Item' of non-object in /home/vinemupw/public_html/project/callbacks/stkcallback.php on line 30 [13-Feb-2019 14:46:07 Europe/London] PHP Notice: Trying to get property 'Value' of non-object in /home/vinemupw/pub lic_html/project/callbacks/stkcallback.php on line 30 [13-Feb-2019 14:46:07 Europe/London] PHP Warning: json_decode() expects parameter 1 to be string, array given in /home/vinemupw/public_html/project/callbacks/stkcallback.php on line 64

Answer 1

Did you json_decode the response ? Suggesting $data holds the json string you have to do

$arr = json_decode($data, true); 

Then you can access the ResultCode for example with:

$arr['Body']['stkCallback']['ResultCode'];

To access the Item list

    $callbackMetadata = $data['Body']['stkCallback']['CallbackMetadata'];
    $amount = $callbackMetadata['Item'][0];

As a note: The second parameter in json_decode defines if an assoc array or an object should be returned.

Edit : The json you posted above has an invalide structure, did you maybe remove some values ?