In our examples we echo the results or the error. For example:
try {
$create_payment_request = new CreatePaymentRequest($token, Uuid::uuid4(), $money);
$response = $payments_api->createPayment($create_payment_request);
if ($response->isSuccess()) {
echo json_encode($response->getResult());
} else {
echo json_encode(array('errors' => $response->getErrors()));
}
} catch (ApiException $e) {
echo json_encode(array('errors' => $e));
}
Also feel free to checkout our PHP example with the Web Payments SDK.