我正在使用PHP中的PayPal API来创建交易，包括信用卡和通过PayPal本身。此外，我需要能够退款这些交易。我使用的代码大部分都是直接从PayPal API示例中复制的，对于信用卡交易可以正常工作，但是对于PayPal交易则失败了。具体而言，我尝试通过Payment对象深入挖掘并提取该销售的ID。通过信用卡进行付款的Payment对象包含RelatedResources对象，而RelatedResources对象又包含带有ID的Sale对象，但是通过PayPal进行付款的Payment对象似乎不包含它们。因此，我的问题是，如何从通过PayPal进行的付款中检索Sale ID？
以下是使用存储的信用卡创建付款的方法：
相比之下，以下是我如何进行 PayPal 支付的流程。它是一个两步骤的过程。首先用户会被导向到 PayPal 的网站，然后当他们回到我的网站时，支付将被处理。
有没有想法如何检索销售ID？谢谢！
以下是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，以下是我如何进行 PayPal 支付的流程。它是一个两步骤的过程。首先用户会被导向到 PayPal 的网站，然后当他们回到我的网站时，支付将被处理。
$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;
以下是第二部分，当用户被重定向到我的网站并收到“成功”消息时：
$payment = Payment::get($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);
下面是我如何退款的过程。API示例中没有讨论如何检索销售ID，因此我会通过对象进行钻取。通过PayPal进行的付款没有RelatedResources对象，因此操作失败：
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;
}
有没有想法如何检索销售ID？谢谢！