Getting the name of a stdClass object in PHP - php

Question

I'm playing with an API that's giving me data back in JSON format that I then json_decode() to the following format:
[stockData] => stdClass Object
(
[data] => stdClass Object
(
[PS3] => stdClass Object
(
[2015-01-26T20:45:01Z] => stdClass Object
(
[AMU] => 999.76
[ZIT] => 3.63
)
)
)
[status] => stdClass Object
(
[code] => 200
[text] => ok
)
)
I need some way of getting the 2015-01-26T20:45:01Z (which changes all the time).
I've tried get_Class() on the object, eg:
get_Class($bawsaq->stockData->data->PS3) (actually in a foreach loop)
But all that's returned is: "stdClass" and not the name. How can I get the object's name?

Answer 1

It isn't actually the object's class: it's the name of the property that contains the stdClass object. So you'd need to get the first object property name from $bawsaq->stockData->data->PS3. Which is a bit tricky, actually.
It's nicer to work with arrays. If you use the $assoc parameter of json_decode, you can get an associative array instead of an object whenever a JSON object appears. This is much easier to deal with in PHP.
$bawsaq = json_decode($jsonData, true);
You can get the key name with key:
$dateTime = key($bawsaq['stockData']['data']['PS3']);

Answer 2

When you decode the JSON, use
$bawsaq = json_decode($json, true);
This will return associative arrays instead of stdClass objects for all the JSON objects. Then you can use
$keys = array_keys($bawsaq['stockData']['data'];
$date = $keys[0];

Answer 3

You can use get_object_vars method.
$obj = new stdClass();
$obj->field1 = 'value1';
print_r(get_object_vars($obj));
Result:
Array
(
[field1] => value1
)

Answer 4

You can use the second argument to json_decode. This will return the data as an associative array instead of an object list, so you could simply use
$input = json_decode($jsonInput, true);
$key = key($input['stockData']['data']['PS3']);
$data = $input['stockData']['data']['PS3'][$key];
or a foreach-loop. See also key on php.net.