Updates to Sample Code

- Updated UI Presentation on samples
- Fixed Bugs

sample/payments/AuthorizePayment.php

@@ -0,0 +1,81 @@
+<?php
+// # Authorize Payment
+// This sample code demonstrates how you can authorize a payment.
+// API used: /v1/payments/authorization
+// https://developer.paypal.com/webapps/developer/docs/integration/direct/capture-payment/#authorize-the-payment
+
+require __DIR__ . '/../bootstrap.php';
+
+use PayPal\Api\Address;
+use PayPal\Api\CreditCard;
+use PayPal\Api\FundingInstrument;
+use PayPal\Api\Payer;
+use PayPal\Api\Amount;
+use PayPal\Api\Transaction;
+use PayPal\Api\Payment;
+
+// The biggest difference between creating a payment, and authorizing a payment is to set the intent of payment
+// to correct setting. In this case, it would be 'authorize'
+$addr = new Address();
+$addr->setLine1("3909 Witmer Road")
+    ->setLine2("Niagara Falls")
+    ->setCity("Niagara Falls")
+    ->setState("NY")
+    ->setPostalCode("14305")
+    ->setCountryCode("US")
+    ->setPhone("716-298-1822");
+
+$card = new CreditCard();
+$card->setType("visa")
+    ->setNumber("4417119669820331")
+    ->setExpireMonth("11")
+    ->setExpireYear("2019")
+    ->setCvv2("012")
+    ->setFirstName("Joe")
+    ->setLastName("Shopper")
+    ->setBillingAddress($addr);
+
+$fi = new FundingInstrument();
+$fi->setCreditCard($card);
+
+$payer = new Payer();
+$payer->setPaymentMethod("credit_card")
+    ->setFundingInstruments(array($fi));
+
+$amount = new Amount();
+$amount->setCurrency("USD")
+    ->setTotal("1.00");
+
+$transaction = new Transaction();
+$transaction->setAmount($amount)
+    ->setDescription("Payment description.");
+
+$payment = new Payment();
+
+// Setting intent to authorize creates a payment
+// authorization. Setting it to sale creates actual payment
+$payment->setIntent("authorize")
+    ->setPayer($payer)
+    ->setTransactions(array($transaction));
+
+// For Sample Purposes Only.
+$request = clone $payment;
+
+// ### Create Payment
+// Create a payment by calling the payment->create() method
+// with a valid ApiContext (See bootstrap.php for more on `ApiContext`)
+// The return object contains the state.
+try {
+    $payment->create($apiContext);
+} catch (Exception $ex) {
+    ResultPrinter::printError('Authorize a Payment', 'Authorized Payment', $payment->getId(), $request, $ex);
+    exit(1);
+}
+
+ResultPrinter::printResult('Authorize a Payment', 'Authorized Payment', $payment->getId(), $request, $payment);
+
+$transactions = $payment->getTransactions();
+$relatedResources = $transactions[0]->getRelatedResources();
+$authorization = $relatedResources[0]->getAuthorization();
+
+return $authorization;