How to break down the json, obtained from curl?

I use php curl to retrieve json data from http
, and then I use foreach array to display all the data
, but when I encounter a problem, how to break it down?
what kind of data does the counterparty need to give me?
for example, he has a total of 30 yuan
I want to do 10 times a week.

< hr >

charge

$data = array(
    "xxx" => "xxx"
  );
  $data_string = json_encode($data);
  $ch = curl_init($api);
  curl_setopt($ch, CURLOPT_POST, 1);
  curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "POST");
  curl_setopt($ch, CURLOPT_POSTFIELDS, $data_string);
  curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
  curl_setopt($ch, CURLOPT_HTTPHEADER, array(
      "Content-Type: application/json",
      "Content-Length: " . strlen($data_string))
  );
  curl_setopt($ch, CURLOPT_TIMEOUT, 5);
  curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 5);
  $result = curl_exec($ch);
  curl_close($ch);
  $data = json_decode($result);

suppose that I use foreach to print out all the data
how to make a score?

foreach ($data->orders as $order) {
}