PHP Payment Example Question

[bug-logic]

Using the PHP Payment Example, there is no explanation on how to send additional values to the process-payment file. For example, assuming the Sandbox test returns a Payment Successful response and the form being used is as follows:

<form class="payment-form" id="fast-checkout">
  <input type="hidden"  name="amount" id="amount" value="10">
  <input type="hidden" name="address"  id="address" value="200 Maple Street">
    <div class="wrapper">
      <div id="card-container"></div>
      <button id="card-button" type="button">Pay with Card</button>
      <span id="payment-flow-message"></span>
    </div>
  </form>

What is the procedure for obtaining the values for amount and address?

$amount = intval($_POST['amount']);

Is clearly a non-starter.

[bug-logic]

If anyone shows up with the same question, here is the answer. Assuming you have some input fields, the values of which you need to pass along to process-payment.php, such as:

<input type="hidden" id="amount" value="40">
<input type="hidden" id="customer" value="Mr. Big">
<input type="hidden" id="whatever" value="Something else">

Open up the sq-payment-flow.js file At the TOP of the file, get the values you need. For example:

amount = document.getElementById('amount').value;
customer = document.getElementById('customer').value;
whatever = document.getElementById('whatever').value;

Now roll down the sq-payment-flow.js file and look for function(token) and put your values in there. For example:

window.createPayment = async function(token) {
  const dataJsonString = JSON.stringify({
    token,
    amount,
    customer,
    whatever
  });

Now crack open the provided process-payment.php file, and BELOW $data = json_decode($json); collect your variables in the $data return. For example:

$amount = $data->amount;
$customer = $data->customer;
$whatever = $data->whatever;

And that's that. Not sure why this is not clearly documented, but there ya go.