贝宝PHP SDK错误

Question

so I want to integrate paypal payments to my site.

I tried integrating the paypal button form straight from paypal but there is a problem with it. The price of the product can be changed by easily inspecting the element and changing the price input.

I found out about the Paypal PHP SDK so I installed it via composer. The problem I'm having is when I want the user to pay for the product.

I copied and pasted the Create Payment method found here . But I'm getting and error:

Notice: Undefined variable: apiContext in C:\xampp\htdocs\paypal\index.php on line 62

Fatal error: Class 'ResultPrinter' not found in C:\xampp\htdocs\paypal\index.php on line 64

I know I'm getting this error because I haven't initialized this variable. I don't know where to create it and what this variable it must contain. Does anyone know how to fully integrate this?

Any help is greatly appreciated. Thanks in advanced!

This is my full PHP code:

<?php

require 'vendor/autoload.php';
use PayPal\Api\Amount;
use PayPal\Api\Details;
use PayPal\Api\Item;
use PayPal\Api\ItemList;
use PayPal\Api\Payer;
use PayPal\Api\Payment;
use PayPal\Api\RedirectUrls;
use PayPal\Api\Transaction;

$payer = new Payer();
$payer->setPaymentMethod("paypal");

$item1 = new Item();
$item1->setName('Ground Coffee 40 oz')
    ->setCurrency('USD')
    ->setQuantity(1)
    ->setSku("123123") // Similar to `item_number` in Classic API
    ->setPrice(7.5);
$item2 = new Item();
$item2->setName('Granola bars')
    ->setCurrency('USD')
    ->setQuantity(5)
    ->setSku("321321") // Similar to `item_number` in Classic API
    ->setPrice(2);

$itemList = new ItemList();
$itemList->setItems(array($item1, $item2));

$details = new Details();
$details->setShipping(1.2)
    ->setTax(1.3)
    ->setSubtotal(17.50);

$amount = new Amount();
$amount->setCurrency("USD")
    ->setTotal(20)
    ->setDetails($details);

$transaction = new Transaction();
$transaction->setAmount($amount)
    ->setItemList($itemList)
    ->setDescription("Payment description")
    ->setInvoiceNumber(uniqid());

//I changed the base url and the return url's to mine.
$baseUrl = "http://www.localhost/paypal";
$redirectUrls = new RedirectUrls();
$redirectUrls->setReturnUrl("$baseUrl/ExecutePayment.php?success=true")
    ->setCancelUrl("$baseUrl/ExecutePayment.php?success=false");

$payment = new Payment();
$payment->setIntent("sale")
    ->setPayer($payer)
    ->setRedirectUrls($redirectUrls)
    ->setTransactions(array($transaction));

$request = clone $payment;

try {
    $payment->create($apiContext);
} catch (Exception $ex) {
    ResultPrinter::printError("Created Payment Using PayPal. Please visit the URL to Approve.", "Payment", null, $request, $ex);
    exit(1);
}

$approvalUrl = $payment->getApprovalLink();

ResultPrinter::printResult("Created Payment Using PayPal. Please visit the URL to Approve.", "Payment", "<a href='$approvalUrl' >$approvalUrl</a>", $request, $payment);

return $payment;

Answer 1

It looks like you've not defined $apiContext . I'm not totally familiar with this SDK but it looks like you can create one like so:

$apiContext = new \Paypal\Rest\ApiContext(
    new \PayPal\Auth\AuthTokenCredential(
        $clientId,
        $clientSecret
    )
);

reference

You will need to pass in your $clientId and $clientSecret that you have obtained from PayPal.