PHP Braintree Gateway API - php

Question

Be patient with me, I am trying to create a Braintree Gateway for my wordpress booking system with no knowledge of php. i have downloaded the php library files from Braintree and ive implemented the area for api connection and creating a transaction using the following code below. This code was taken and tweaked from another gateway! Is this a good method to use? Would this work?
My Code
$config = new Braintree\Configuration();
$config->environment($api_keys_merchant_id);
$config->merchantId(trim($api_keys_merchant_id));
$config->publicKey(trim($api_keys_public_key));
$config->privateKey(trim($api_keys_private_key));
$gateway = new Braintree\Gateway($config);
// Create transaction
$result = $gateway->transaction()->sale([
'amount' => $price,
'paymentMethodNonce' => 'nonceFromTheClient',
'options' => [ 'submitForSettlement' => true ]]);
if ($result->success) {
print_r("success!: " . $result->transaction->id);
} else if ($result->transaction) {
print_r("Error processing transaction:");
print_r("\n code: " . $result->transaction->processorResponseCode);
print_r("\n text: " . $result->transaction->processorResponseText);
} else {
print_r("Validation errors: \n");
print_r($result->errors->deepAll());
} ```

Answer 1

Personally, I do not understand what the problem is, so please state it, if any. In terms of adjustments, from the code sample attached, I would say:
don't reference unknown variables or share context about them (eg: $parsedCredentials is initialised but not used; also what is $request?)
use "use" statements at the top of the file instead of using the FQCN; it makes it easier to understand what the dependencies are and what the code does.

Answer 2

$gateway = new Braintree_Gateway([
'environment' => $api_keys_merchant_id,
'merchantId' => trim($api_keys_merchant_id),
'publicKey' => 'use_your_public_key',
'privateKey' => 'use_your_private_key'
]);
$result = $gateway->transaction()->sale([
'amount' => $price,
'paymentMethodNonce' => 'nonceFromTheClient',
'options' => [ 'submitForSettlement' => true ]]);
if ($result->success) {
print_r("success!: " . $result->transaction->id);
} else if ($result->transaction) {
print_r("Error processing transaction:");
print_r("\n code: " . $result->transaction->processorResponseCode);
print_r("\n text: " . $result->transaction->processorResponseText);
} else {
print_r("Validation errors: \n");
print_r($result->errors->deepAll());
}