我在 PHP 中使用 PayPal API 来创建交易，包括信用卡和 PayPal 本身。此外，我需要能够退还这些交易。我使用的代码大部分直接来自 PayPal API 示例，适用于信用卡交易，但它无法用于 PayPal 交易。具体来说，我正在尝试深入了解 Payment 对象并提取该销售的 ID。通过信用卡进行的付款对象包含一个 RelatedResources 对象，该对象又包含带有 ID 的 Sale 对象，但通过 PayPal 进行的付款对象似乎不包含它们。所以，我的问题是，如何从通过 PayPal 支付的款项中检索销售 ID？
以下是我使用存储的信用卡创建付款的方法：
$creditCardToken = new CreditCardToken();
$creditCardToken->setCreditCardId('CARD-2WG5320481993380UKI5FSFI');
// ### FundingInstrument
// A resource representing a Payer's funding instrument.
// For stored credit card payments, set the CreditCardToken
// field on this object.
$fi = new FundingInstrument();
$fi->setCreditCardToken($creditCardToken);
// ### Payer
// A resource representing a Payer that funds a payment
// For stored credit card payments, set payment method
// to 'credit_card'.
$payer = new Payer();
$payer->setPaymentMethod("credit_card")
->setFundingInstruments(array($fi));
// ### Amount
// Lets you specify a payment amount.
// You can also specify additional details
// such as shipping, tax.
$amount = new Amount();
$amount->setCurrency("USD")
->setTotal('1.00');
// ### Transaction
// A transaction defines the contract of a
// payment - what is the payment for and who
// is fulfilling it.
$transaction = new Transaction();
$transaction->setAmount($amount)
->setDescription("Payment description");
// ### Payment
// A Payment Resource; create one using
// the above types and intent set to 'sale'
$payment = new Payment();
$payment->setIntent("sale")
->setPayer($payer)
->setTransactions(array($transaction));
// ###Create Payment
// Create a payment by calling the 'create' method
// passing it a valid apiContext.
// (See bootstrap.php for more on `ApiContext`)
// The return object contains the state.
try {
$payment->create($apiContext);
} catch (PayPal\Exception\PPConnectionException $ex) {
error_log($ex->getMessage());
error_log(print_r($ex->getData(), true));
}
相比之下，这是我进行 PayPal 付款的方式。这是一个两步的过程。首先，用户被定向到 PayPal 的网站，然后，当他们返回我的网站时，付款得到处理。
第1部分：
$payer = new Payer();
$payer->setPaymentMethod("paypal");
$amount = new Amount();
$amount->setCurrency("USD")
->setTotal($userInfo['amount']);
$transaction = new Transaction();
$transaction->setAmount($amount)
->setDescription("Payment description");
// ### Redirect urls
// Set the urls that the buyer must be redirected to after
// payment approval/ cancellation.
$baseUrl = 'http://example.com';
$redirectUrls = new RedirectUrls();
$redirectUrls->setReturnUrl("$baseUrl/?success=true")
->setCancelUrl("$baseUrl/?success=false");
$payment = new Payment();
$payment->setIntent("sale")
->setPayer($payer)
->setRedirectUrls($redirectUrls)
->setTransactions(array($transaction));
try {
$payment->create($apiContext);
} catch (PayPal\Exception\PPConnectionException $ex) {
error_log($ex->getMessage());
error_log(print_r($ex->getData(), true));
return;
}
// ### Get redirect url
// The API response provides the url that you must redirect
// the buyer to. Retrieve the url from the $payment->getLinks()
// method
foreach($payment->getLinks() as $link) {
if($link->getRel() == 'approval_url') {
$redirectUrl = $link->getHref();
break;
}
}
// ### Redirect buyer to PayPal website
// Save payment id so that you can 'complete' the payment
// once the buyer approves the payment and is redirected
// bacl to your website.
//
// It is not really a great idea to store the payment id
// in the session. In a real world app, you may want to
// store the payment id in a database.
$_SESSION['paymentId'] = $payment->getId();
if(isset($redirectUrl)) {
$response->redirectUrl = $redirectUrl;
}
return $response;
这是第 2 部分，当用户使用“成功”消息重定向到我的网站时：
$payment = Payment::get($lineitem->paypal_payment_ID, $apiContext);
// PaymentExecution object includes information necessary
// to execute a PayPal account payment.
// The payer_id is added to the request query parameters
// when the user is redirected from paypal back to your site
$execution = new PaymentExecution();
$execution->setPayer_id($_GET['PayerID']);
//Execute the payment
// (See bootstrap.php for more on `ApiContext`)
$payment->execute($execution, $apiContext);
这就是我如何退还交易。API 中的示例没有讨论如何检索销售 ID，因此我深入研究了这些对象。通过 PayPal 进行的付款没有 RelatedResources 对象，因此失败：
try {
$payment = Payment::get('PAY-8TB50937RV8840649KI6N33Y', $apiContext);
$transactions = $payment->getTransactions();
$resources = $transactions[0]->getRelatedResources();//This DOESN'T work for PayPal transactions.
$sale = $resources[0]->getSale();
$saleID = $sale->getId();
// ### Refund amount
// Includes both the refunded amount (to Payer)
// and refunded fee (to Payee). Use the $amt->details
// field to mention fees refund details.
$amt = new Amount();
$amt->setCurrency('USD')
->setTotal($lineitem->cost);
// ### Refund object
$refund = new Refund();
$refund->setAmount($amt);
// ###Sale
// A sale transaction.
// Create a Sale object with the
// given sale transaction id.
$sale = new Sale();
$sale->setId($saleID);
try {
// Refund the sale
// (See bootstrap.php for more on `ApiContext`)
$sale->refund($refund, $apiContext);
} catch (PayPal\Exception\PPConnectionException $ex) {
error_log($ex->getMessage());
error_log(print_r($ex->getData(), true));
return;
}
} catch (PayPal\Exception\PPConnectionException $ex) {
error_log($ex->getMessage());
error_log(print_r($ex->getData(), true));
return;
}
关于如何检索销售 ID 的任何想法？谢谢！