recreate project

vendor/paypal/rest-api-sdk-php/sample/invoice/CancelInvoice.php

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+<?php
+
+// # Cancel Invoice Sample
+// This sample code demonstrate how you can cancel
+// an invoice.
+
+/** @var Invoice $invoice */
+$invoice = require 'SendInvoice.php';
+
+use PayPal\Api\CancelNotification;
+use PayPal\Api\Invoice;
+
+try {
+
+    // ### Cancel Notification Object
+    // This would send a notification to both merchant as well
+    // the payer about the cancellation. The information of
+    // merchant and payer is retrieved from the invoice details
+    $notify = new CancelNotification();
+    $notify
+        ->setSubject("Past due")
+        ->setNote("Canceling invoice")
+        ->setSendToMerchant(true)
+        ->setSendToPayer(true);
+
+
+    // ### Cancel Invoice
+    // Cancel invoice object by calling the
+    // static `cancel` method
+    // on the Invoice class by passing a valid
+    // notification object
+    // (See bootstrap.php for more on `ApiContext`)
+    $cancelStatus = $invoice->cancel($notify, $apiContext);
+} catch (Exception $ex) {
+    // NOTE: PLEASE DO NOT USE RESULTPRINTER CLASS IN YOUR ORIGINAL CODE. FOR SAMPLE ONLY
+ 	ResultPrinter::printError("Cancel Invoice", "Invoice", null, $notify, $ex);
+    exit(1);
+}
+
+// NOTE: PLEASE DO NOT USE RESULTPRINTER CLASS IN YOUR ORIGINAL CODE. FOR SAMPLE ONLY
+ ResultPrinter::printResult("Cancel Invoice", "Invoice", $invoice->getId(), $notify, null);

vendor/paypal/rest-api-sdk-php/sample/invoice/CreateInvoice.php

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+<?php
+
+// # Create Invoice Sample
+// This sample code demonstrate how you can create
+// an invoice.
+
+require __DIR__ . '/../bootstrap.php';
+use PayPal\Api\Address;
+use PayPal\Api\BillingInfo;
+use PayPal\Api\Cost;
+use PayPal\Api\Currency;
+use PayPal\Api\Invoice;
+use PayPal\Api\InvoiceAddress;
+use PayPal\Api\InvoiceItem;
+use PayPal\Api\MerchantInfo;
+use PayPal\Api\PaymentTerm;
+use PayPal\Api\Phone;
+use PayPal\Api\ShippingInfo;
+
+$invoice = new Invoice();
+
+// ### Invoice Info
+// Fill in all the information that is
+// required for invoice APIs
+$invoice
+    ->setMerchantInfo(new MerchantInfo())
+    ->setBillingInfo(array(new BillingInfo()))
+    ->setNote("Medical Invoice 16 Jul, 2013 PST")
+    ->setPaymentTerm(new PaymentTerm())
+    ->setShippingInfo(new ShippingInfo());
+
+// ### Merchant Info
+// A resource representing merchant information that can be
+// used to identify merchant
+$invoice->getMerchantInfo()
+    ->setEmail("jaypatel512-facilitator@hotmail.com")
+    ->setFirstName("Dennis")
+    ->setLastName("Doctor")
+    ->setbusinessName("Medical Professionals, LLC")
+    ->setPhone(new Phone())
+    ->setAddress(new Address());
+
+$invoice->getMerchantInfo()->getPhone()
+    ->setCountryCode("001")
+    ->setNationalNumber("5032141716");
+
+// ### Address Information
+// The address used for creating the invoice
+$invoice->getMerchantInfo()->getAddress()
+    ->setLine1("1234 Main St.")
+    ->setCity("Portland")
+    ->setState("OR")
+    ->setPostalCode("97217")
+    ->setCountryCode("US");
+
+// ### Billing Information
+// Set the email address for each billing
+$billing = $invoice->getBillingInfo();
+$billing[0]
+    ->setEmail("example@example.com");
+
+$billing[0]->setBusinessName("Jay Inc")
+    ->setAdditionalInfo("This is the billing Info")
+    ->setAddress(new InvoiceAddress());
+
+$billing[0]->getAddress()
+    ->setLine1("1234 Main St.")
+    ->setCity("Portland")
+    ->setState("OR")
+    ->setPostalCode("97217")
+    ->setCountryCode("US");
+
+// ### Items List
+// You could provide the list of all items for
+// detailed breakdown of invoice
+$items = array();
+$items[0] = new InvoiceItem();
+$items[0]
+    ->setName("Sutures")
+    ->setQuantity(100)
+    ->setUnitPrice(new Currency());
+
+$items[0]->getUnitPrice()
+    ->setCurrency("USD")
+    ->setValue(5);
+
+// #### Tax Item
+// You could provide Tax information to each item.
+$tax = new \PayPal\Api\Tax();
+$tax->setPercent(1)->setName("Local Tax on Sutures");
+$items[0]->setTax($tax);
+
+// Second Item
+$items[1] = new InvoiceItem();
+// Lets add some discount to this item.
+$item1discount = new Cost();
+$item1discount->setPercent("3");
+$items[1]
+    ->setName("Injection")
+    ->setQuantity(5)
+    ->setDiscount($item1discount)
+    ->setUnitPrice(new Currency());
+
+$items[1]->getUnitPrice()
+    ->setCurrency("USD")
+    ->setValue(5);
+
+// #### Tax Item
+// You could provide Tax information to each item.
+$tax2 = new \PayPal\Api\Tax();
+$tax2->setPercent(3)->setName("Local Tax on Injection");
+$items[1]->setTax($tax2);
+
+$invoice->setItems($items);
+
+// #### Final Discount
+// You can add final discount to the invoice as shown below. You could either use "percent" or "value" when providing the discount
+$cost = new Cost();
+$cost->setPercent("2");
+$invoice->setDiscount($cost);
+
+$invoice->getPaymentTerm()
+    ->setTermType("NET_45");
+
+// ### Shipping Information
+$invoice->getShippingInfo()
+    ->setFirstName("Sally")
+    ->setLastName("Patient")
+    ->setBusinessName("Not applicable")
+    ->setPhone(new Phone())
+    ->setAddress(new InvoiceAddress());
+
+$invoice->getShippingInfo()->getPhone()
+    ->setCountryCode("001")
+    ->setNationalNumber("5039871234");
+
+$invoice->getShippingInfo()->getAddress()
+    ->setLine1("1234 Main St.")
+    ->setCity("Portland")
+    ->setState("OR")
+    ->setPostalCode("97217")
+    ->setCountryCode("US");
+
+// ### Logo
+// You can set the logo in the invoice by providing the external URL pointing to a logo
+$invoice->setLogoUrl('https://www.paypalobjects.com/webstatic/i/logo/rebrand/ppcom.svg');
+
+// For Sample Purposes Only.
+$request = clone $invoice;
+
+try {
+    // ### Create Invoice
+    // Create an invoice by calling the invoice->create() method
+    // with a valid ApiContext (See bootstrap.php for more on `ApiContext`)
+    $invoice->create($apiContext);
+} catch (Exception $ex) {
+    // NOTE: PLEASE DO NOT USE RESULTPRINTER CLASS IN YOUR ORIGINAL CODE. FOR SAMPLE ONLY
+ 	ResultPrinter::printError("Create Invoice", "Invoice", null, $request, $ex);
+    exit(1);
+}
+
+// NOTE: PLEASE DO NOT USE RESULTPRINTER CLASS IN YOUR ORIGINAL CODE. FOR SAMPLE ONLY
+ ResultPrinter::printResult("Create Invoice", "Invoice", $invoice->getId(), $request, $invoice);
+
+return $invoice;

vendor/paypal/rest-api-sdk-php/sample/invoice/DeleteInvoice.php

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+<?php
+
+// # Delete Invoice Sample
+// This sample code demonstrate how you can delete
+// an invoice.
+
+/** @var Invoice $invoice */
+$invoice = require 'CreateInvoice.php';
+
+use PayPal\Api\Invoice;
+
+try {
+
+    // ### Delete Invoice
+    // Delete invoice object by calling the
+    // `delete` method
+    // on the Invoice class by passing a valid
+    // notification object
+    // (See bootstrap.php for more on `ApiContext`)
+    $deleteStatus = $invoice->delete($apiContext);
+} catch (Exception $ex) {
+    // NOTE: PLEASE DO NOT USE RESULTPRINTER CLASS IN YOUR ORIGINAL CODE. FOR SAMPLE ONLY
+ 	ResultPrinter::printError("Delete Invoice", "Invoice", null, $deleteStatus, $ex);
+    exit(1);
+}
+
+// NOTE: PLEASE DO NOT USE RESULTPRINTER CLASS IN YOUR ORIGINAL CODE. FOR SAMPLE ONLY
+ ResultPrinter::printResult("Delete Invoice", "Invoice", $invoice->getId(), null, null);

vendor/paypal/rest-api-sdk-php/sample/invoice/GetInvoice.php

@@ -0,0 +1,30 @@
+<?php
+
+// # Get Invoice Sample
+// This sample code demonstrate how you can retrieve
+// an invoice.
+
+/** @var Invoice $invoice */
+$invoice = require 'CreateInvoice.php';
+use PayPal\Api\Invoice;
+
+$invoiceId = $invoice->getId();
+
+// ### Retrieve Invoice
+// Retrieve the invoice object by calling the
+// static `get` method
+// on the Invoice class by passing a valid
+// Invoice ID
+// (See bootstrap.php for more on `ApiContext`)
+try {
+    $invoice = Invoice::get($invoiceId, $apiContext);
+} catch (Exception $ex) {
+    // NOTE: PLEASE DO NOT USE RESULTPRINTER CLASS IN YOUR ORIGINAL CODE. FOR SAMPLE ONLY
+ 	ResultPrinter::printError("Get Invoice", "Invoice", $invoice->getId(), $invoiceId, $ex);
+    exit(1);
+}
+
+// NOTE: PLEASE DO NOT USE RESULTPRINTER CLASS IN YOUR ORIGINAL CODE. FOR SAMPLE ONLY
+ ResultPrinter::printResult("Get Invoice", "Invoice", $invoice->getId(), $invoiceId, $invoice);
+
+return $invoice;

vendor/paypal/rest-api-sdk-php/sample/invoice/ListInvoice.php

@@ -0,0 +1,24 @@
+<?php
+
+// # List Invoices Sample
+// This sample code demonstrate how you can get
+// all invoice from history.
+
+/** @var Invoice $invoice */
+$invoice = require 'CreateInvoice.php';
+use PayPal\Api\Invoice;
+
+try {
+    // ### Retrieve Invoices
+    // Retrieve the Invoice History object by calling the
+    // static `get_all` method on the Invoice class.
+    // Refer the method doc for valid values for keys
+    // (See bootstrap.php for more on `ApiContext`)
+    $invoices = Invoice::getAll(array('page' => 0, 'page_size' => 4, 'total_count_required' => "true"), $apiContext);
+} catch (Exception $ex) {
+    // NOTE: PLEASE DO NOT USE RESULTPRINTER CLASS IN YOUR ORIGINAL CODE. FOR SAMPLE ONLY
+ 	ResultPrinter::printError("Lookup Invoice History", "Invoice", null, null, $ex);
+    exit(1);
+}
+// NOTE: PLEASE DO NOT USE RESULTPRINTER CLASS IN YOUR ORIGINAL CODE. FOR SAMPLE ONLY
+ ResultPrinter::printResult("Lookup Invoice History", "Invoice", null, null, $invoices);

vendor/paypal/rest-api-sdk-php/sample/invoice/RecordPayment.php

@@ -0,0 +1,58 @@
+<?php
+
+// # Record Payment Sample
+// This sample code demonstrate how you can record
+// an invoice as paid.
+
+/** @var Invoice $invoice */
+$invoice = require 'SendInvoice.php';
+
+use PayPal\Api\Invoice;
+use PayPal\Api\PaymentDetail;
+
+try {
+    // ### Record Object
+    // Create a PaymentDetail object, and fill in the required fields
+    // You can use the new way of injecting json directly to the object.
+    $record = new PaymentDetail(
+        '{
+          "method" : "CASH",
+          "date" : "2014-07-06 03:30:00 PST",
+          "note" : "Cash received."
+        }'
+    );
+
+    // ### Record Payment for Invoice
+    // Record a payment on invoice object by calling the
+    // `recordPayment` method
+    // on the Invoice class by passing a valid
+    // notification object
+    // (See bootstrap.php for more on `ApiContext`)
+    $recordStatus = $invoice->recordPayment($record, $apiContext);
+} catch (Exception $ex) {
+    // NOTE: PLEASE DO NOT USE RESULTPRINTER CLASS IN YOUR ORIGINAL CODE. FOR SAMPLE ONLY
+ 	ResultPrinter::printError("Payment for Invoice", "Invoice", null, null, $ex);
+    exit(1);
+}
+
+// NOTE: PLEASE DO NOT USE RESULTPRINTER CLASS IN YOUR ORIGINAL CODE. FOR SAMPLE ONLY
+ ResultPrinter::printResult("Payment for Invoice", "Invoice", $invoice->getId(), $record, null);
+
+// ### Retrieve Invoice
+// Retrieve the invoice object by calling the
+// static `get` method
+// on the Invoice class by passing a valid
+// Invoice ID
+// (See bootstrap.php for more on `ApiContext`)
+try {
+    $invoice = Invoice::get($invoice->getId(), $apiContext);
+} catch (Exception $ex) {
+    // NOTE: PLEASE DO NOT USE RESULTPRINTER CLASS IN YOUR ORIGINAL CODE. FOR SAMPLE ONLY
+ 	ResultPrinter::printError("Get Invoice (Not Required - For Sample Only)", "Invoice", $invoice->getId(), $invoice->getId(), $ex);
+    exit(1);
+}
+
+// NOTE: PLEASE DO NOT USE RESULTPRINTER CLASS IN YOUR ORIGINAL CODE. FOR SAMPLE ONLY
+ ResultPrinter::printResult("Get Invoice (Not Required - For Sample Only)", "Invoice", $invoice->getId(), $invoice->getId(), $invoice);
+
+return $invoice;

vendor/paypal/rest-api-sdk-php/sample/invoice/RecordRefund.php

@@ -0,0 +1,57 @@
+<?php
+
+// # Record Refund Sample
+// This sample code demonstrate how you can record
+// an invoice as refunded.
+
+/** @var Invoice $invoice */
+$invoice = require 'RecordPayment.php';
+
+use PayPal\Api\Invoice;
+use PayPal\Api\RefundDetail;
+
+try {
+    // ### Record Object
+    // Create a RefundDetail object, and fill in the required fields
+    // You can use the new way of injecting json directly to the object.
+    $refund = new RefundDetail(
+        '{
+          "date" : "2014-07-06 03:30:00 PST",
+          "note" : "Refund provided by cash."
+        }'
+    );
+
+    // ### Record Refund for Invoice
+    // Record a refund on invoice object by calling the
+    // `recordRefund` method
+    // on the Invoice class by passing a valid
+    // notification object
+    // (See bootstrap.php for more on `ApiContext`)
+    $refundStatus = $invoice->recordRefund($refund, $apiContext);
+} catch (Exception $ex) {
+    // NOTE: PLEASE DO NOT USE RESULTPRINTER CLASS IN YOUR ORIGINAL CODE. FOR SAMPLE ONLY
+ 	ResultPrinter::printError("Refund for Invoice", "Invoice", null, null, $ex);
+    exit(1);
+}
+
+// NOTE: PLEASE DO NOT USE RESULTPRINTER CLASS IN YOUR ORIGINAL CODE. FOR SAMPLE ONLY
+ ResultPrinter::printResult("Refund for Invoice", "Invoice", $invoice->getId(), $refund, null);
+
+// ### Retrieve Invoice
+// Retrieve the invoice object by calling the
+// static `get` method
+// on the Invoice class by passing a valid
+// Invoice ID
+// (See bootstrap.php for more on `ApiContext`)
+try {
+    $invoice = Invoice::get($invoice->getId(), $apiContext);
+} catch (Exception $ex) {
+    // NOTE: PLEASE DO NOT USE RESULTPRINTER CLASS IN YOUR ORIGINAL CODE. FOR SAMPLE ONLY
+ 	ResultPrinter::printError("Get Invoice (Not Required - For Sample Only)", "Invoice", $invoice->getId(), $invoice->getId(), $ex);
+    exit(1);
+}
+
+// NOTE: PLEASE DO NOT USE RESULTPRINTER CLASS IN YOUR ORIGINAL CODE. FOR SAMPLE ONLY
+ ResultPrinter::printResult("Get Invoice (Not Required - For Sample Only)", "Invoice", $invoice->getId(), $invoice->getId(), $invoice);
+
+return $invoice;

vendor/paypal/rest-api-sdk-php/sample/invoice/RemindInvoice.php

@@ -0,0 +1,58 @@
+<?php
+
+// # Remind Invoice Sample
+// This sample code demonstrate how you can remind
+// an invoice to the payer
+
+/** @var Invoice $invoice */
+$invoice = require 'SendInvoice.php';
+
+use PayPal\Api\Invoice;
+use PayPal\Api\Notification;
+
+try {
+
+    // ### Notification Object
+    // This would send a notification to both merchant as well
+    // the payer. The information of merchant
+    // and payer is retrieved from the invoice details
+    $notify = new Notification();
+    $notify
+        ->setSubject("Past due")
+        ->setNote("Please pay soon")
+        ->setSendToMerchant(true);
+
+    // ### Remind Invoice
+    // Remind the notifiers by calling the
+    // `remind` method
+    // on the Invoice class by passing a valid
+    // notification object
+    // (See bootstrap.php for more on `ApiContext`)
+    $remindStatus = $invoice->remind($notify, $apiContext);
+} catch (Exception $ex) {
+    // NOTE: PLEASE DO NOT USE RESULTPRINTER CLASS IN YOUR ORIGINAL CODE. FOR SAMPLE ONLY
+ 	ResultPrinter::printError("Remind Invoice", "Invoice", null, $notify, $ex);
+    exit(1);
+}
+
+// NOTE: PLEASE DO NOT USE RESULTPRINTER CLASS IN YOUR ORIGINAL CODE. FOR SAMPLE ONLY
+ ResultPrinter::printResult("Remind Invoice", "Invoice", null, $notify, null);
+
+// ### Retrieve Invoice
+// Retrieve the invoice object by calling the
+// static `get` method
+// on the Invoice class by passing a valid
+// Invoice ID
+// (See bootstrap.php for more on `ApiContext`)
+try {
+    $invoice = Invoice::get($invoice->getId(), $apiContext);
+} catch (Exception $ex) {
+    // NOTE: PLEASE DO NOT USE RESULTPRINTER CLASS IN YOUR ORIGINAL CODE. FOR SAMPLE ONLY
+ 	ResultPrinter::printError("Get Invoice (Not Required - For Sample Only)", "Invoice", $invoice->getId(), $invoice->getId(), $ex);
+    exit(1);
+}
+
+// NOTE: PLEASE DO NOT USE RESULTPRINTER CLASS IN YOUR ORIGINAL CODE. FOR SAMPLE ONLY
+ ResultPrinter::printResult("Get Invoice (Not Required - For Sample Only)", "Invoice", $invoice->getId(), $invoice->getId(), $invoice);
+
+return $invoice;

vendor/paypal/rest-api-sdk-php/sample/invoice/RetrieveQRCode.php

@@ -0,0 +1,42 @@
+<?php
+
+// # Retrieve QR Code for Invoice Sample
+// Specify an invoice ID to get a QR code (image) that corresponds to the invoice ID. A QR code for an invoice can be added to a paper or PDF invoice. When a customer uses their mobile device to scan the QR code, the customer is redirected to the PayPal mobile payment flow, where they can pay online with PayPal or a credit card.
+
+/** @var Invoice $invoice */
+$invoice = require 'SendInvoice.php';
+
+use PayPal\Api\Invoice;
+
+try {
+
+    // ### Retrieve QR Code of Sent Invoice
+    // Retrieve QR Code of Sent Invoice by calling the
+    // `qrCode` method
+    // on the Invoice class by passing a valid
+    // notification object
+    // (See bootstrap.php for more on `ApiContext`)
+    $image = Invoice::qrCode($invoice->getId(), array('height' => '300', 'width' => '300'), $apiContext);
+
+    // ### Optionally Save to File
+    // This is not a required step. However, if you want to store this image as a file, you can use
+    // 'saveToFile' method with proper file name.
+    // This will save the image as /samples/invoice/images/sample.png
+    $path = $image->saveToFile("images/sample.png");
+
+
+} catch (Exception $ex) {
+    // NOTE: PLEASE DO NOT USE RESULTPRINTER CLASS IN YOUR ORIGINAL CODE. FOR SAMPLE ONLY
+ 	ResultPrinter::printError("Retrieved QR Code for Invoice", "Invoice", $invoice->getId(), null, $ex);
+    exit(1);
+}
+
+// NOTE: PLEASE DO NOT USE RESULTPRINTER CLASS IN YOUR ORIGINAL CODE. FOR SAMPLE ONLY
+ ResultPrinter::printResult("Retrieved QR Code for Invoice", "Invoice", $invoice->getId(), null, $image);
+
+// ### Show the Image
+// In PHP, there are many ways to present an images.
+// One of the ways, you could directly inject the base64-encoded string
+// with proper image information in front of it.
+echo '<img src="data:image/png;base64,'. $image->getImage() . '" alt="Invoice QR Code" />';
+

vendor/paypal/rest-api-sdk-php/sample/invoice/SearchInvoices.php

@@ -0,0 +1,38 @@
+<?php
+
+// # Search Invoices Sample
+// This sample code demonstrate how you can
+// search invoices from history.
+
+/** @var Invoice $invoice */
+$invoice = require 'CreateInvoice.php';
+use PayPal\Api\Invoice;
+use PayPal\Api\Search;
+
+try {
+    // ### Search Object
+    // Fill up your search criteria for Invoice search.
+    // Using the new way to inject raw json string to constructor
+    $search = new Search(
+        '{
+          "start_invoice_date" : "2010-05-10 PST",
+          "end_invoice_date" : "2019-05-11 PST",
+          "page" : 1,
+          "page_size" : 20,
+          "total_count_required" : true
+        }'
+    );
+
+    // ### Search Invoices
+    // Retrieve the Invoice History object by calling the
+    // static `search` method on the Invoice class.
+    // Refer the method doc for valid values for keys
+    // (See bootstrap.php for more on `ApiContext`)
+    $invoices = Invoice::search($search, $apiContext);
+} catch (Exception $ex) {
+    // NOTE: PLEASE DO NOT USE RESULTPRINTER CLASS IN YOUR ORIGINAL CODE. FOR SAMPLE ONLY
+ 	ResultPrinter::printError("Search Invoice", "Invoice", null, null, $ex);
+    exit(1);
+}
+// NOTE: PLEASE DO NOT USE RESULTPRINTER CLASS IN YOUR ORIGINAL CODE. FOR SAMPLE ONLY
+ ResultPrinter::printResult("Search Invoice", "Invoice", null, $search, $invoices);

vendor/paypal/rest-api-sdk-php/sample/invoice/SendInvoice.php

@@ -0,0 +1,44 @@
+<?php
+
+// # Create Invoice Sample
+// This sample code demonstrate how you can send
+// a legitimate invoice to the payer
+
+/** @var Invoice $invoice */
+$invoice = require 'CreateInvoice.php';
+
+use PayPal\Api\Invoice;
+
+try {
+
+    // ### Send Invoice
+    // Send a legitimate invoice to the payer
+    // with a valid ApiContext (See bootstrap.php for more on `ApiContext`)
+    $sendStatus = $invoice->send($apiContext);
+} catch (Exception $ex) {
+    // NOTE: PLEASE DO NOT USE RESULTPRINTER CLASS IN YOUR ORIGINAL CODE. FOR SAMPLE ONLY
+    ResultPrinter::printError("Send Invoice", "Invoice", null, null, $ex);
+    exit(1);
+}
+
+// NOTE: PLEASE DO NOT USE RESULTPRINTER CLASS IN YOUR ORIGINAL CODE. FOR SAMPLE ONLY
+ ResultPrinter::printResult("Send Invoice", "Invoice", $invoice->getId(), null, null);
+
+// ### Retrieve Invoice
+// Retrieve the invoice object by calling the
+// static `get` method
+// on the Invoice class by passing a valid
+// Invoice ID
+// (See bootstrap.php for more on `ApiContext`)
+try {
+    $invoice = Invoice::get($invoice->getId(), $apiContext);
+} catch (Exception $ex) {
+    // NOTE: PLEASE DO NOT USE RESULTPRINTER CLASS IN YOUR ORIGINAL CODE. FOR SAMPLE ONLY
+ 	ResultPrinter::printError("Get Invoice (Not Required - For Sample Only)", "Invoice", $invoice->getId(), $invoice->getId(), $ex);
+    exit(1);
+}
+
+// NOTE: PLEASE DO NOT USE RESULTPRINTER CLASS IN YOUR ORIGINAL CODE. FOR SAMPLE ONLY
+ ResultPrinter::printResult("Get Invoice (Not Required - For Sample Only)", "Invoice", $invoice->getId(), $invoice->getId(), $invoice);
+
+return $invoice;

vendor/paypal/rest-api-sdk-php/sample/invoice/UpdateInvoice.php

@@ -0,0 +1,57 @@
+<?php
+
+// # Update Invoice Sample
+// This sample code demonstrate how you can update
+// an invoice.
+
+/** @var Invoice $invoice */
+$invoice = require 'CreateInvoice.php';
+use PayPal\Api\Invoice;
+
+// For Sample Purposes Only.
+$request = clone $invoice;
+
+// ### Update Invoice
+// Lets update some information
+$invoice->setInvoiceDate("2014-12-16 PST");
+
+// ### NOTE: These are the work-around added to the
+// sample, to get past the bug in PayPal APIs.
+// There is already an internal ticket #PPTIPS-1932 created for it.
+$invoice->setDiscount(null);
+$billingInfo = $invoice->getBillingInfo()[0];
+$billingInfo->setAddress(null);
+$invoice->getPaymentTerm()->setDueDate(null);
+
+try {
+    // ### Update Invoice
+    // Update an invoice by calling the invoice->update() method
+    // with a valid ApiContext (See bootstrap.php for more on `ApiContext`)
+    $invoice->update($apiContext);
+} catch (Exception $ex) {
+    // NOTE: PLEASE DO NOT USE RESULTPRINTER CLASS IN YOUR ORIGINAL CODE. FOR SAMPLE ONLY
+ 	ResultPrinter::printError("Invoice Updated", "Invoice", null, $request, $ex);
+    exit(1);
+}
+
+// NOTE: PLEASE DO NOT USE RESULTPRINTER CLASS IN YOUR ORIGINAL CODE. FOR SAMPLE ONLY
+ ResultPrinter::printResult("Invoice Updated", "Invoice", $invoice->getId(), $request, $invoice);
+
+// ### Retrieve Invoice
+// Retrieve the invoice object by calling the
+// static `get` method
+// on the Invoice class by passing a valid
+// Invoice ID
+// (See bootstrap.php for more on `ApiContext`)
+try {
+    $invoice = Invoice::get($invoice->getId(), $apiContext);
+} catch (Exception $ex) {
+    // NOTE: PLEASE DO NOT USE RESULTPRINTER CLASS IN YOUR ORIGINAL CODE. FOR SAMPLE ONLY
+ 	ResultPrinter::printError("Get Invoice (Not Required - For Sample Only)", "Invoice", $invoice->getId(), $invoice->getId(), $ex);
+    exit(1);
+}
+
+// NOTE: PLEASE DO NOT USE RESULTPRINTER CLASS IN YOUR ORIGINAL CODE. FOR SAMPLE ONLY
+ ResultPrinter::printResult("Get Invoice (Not Required - For Sample Only)", "Invoice", $invoice->getId(), $invoice->getId(), $invoice);
+
+return $invoice;