Updated samples and its documentation

sample/payments/GetPayment.php

@@ -8,13 +8,12 @@
 // payments list.
 // API used: GET /v1/payments/payments
 
+
+$createdPayment = require __DIR__ . '/CreatePaymentUsingPayPal.php';
 /** @var Payment $createdPayment */
 
 use PayPal\Api\Payment;
 
-// Replace $paymentId with any static Id you might already have. 
-$paymentId = "<your paymentid here>";
-
 // ### Retrieve payment
 // Retrieve the payment object by calling the
 // static `get` method
@@ -22,7 +21,7 @@ $paymentId = "<your paymentid here>";
 // Payment ID
 // (See bootstrap.php for more on `ApiContext`)
 try {
-    $payment = Payment::get($paymentId, $apiContext);
+    $payment = Payment::get($createdPayment->getId(), $apiContext);
 } catch (Exception $ex) {
     // NOTE: PLEASE DO NOT USE RESULTPRINTER CLASS IN YOUR ORIGINAL CODE. FOR SAMPLE ONLY
     ResultPrinter::printError("Get Payment", "Payment", null, null, $ex);