php - 提交 Paypal 请求 - 空白返回屏幕

Question

我不是第一次创建 Paypal 付款请求。我正在尝试设置一本书的付款。图书的价格等详细信息取自数据库中存储的有关图书的数据。用户只需输入图书 ID。理想情况下，这些详细信息会变成 Paypal 付款。

然而，当我提交表单时，我只得到一个空白屏幕。理想情况下，我希望设置付款方式，然后用户可以在网站上确认购买。任何人都可以帮助我尝试消除黑屏吗？

代码:

try {
      $dbh = new PDO('mysql:host=' . DB_HOST . ';dbname=' . DB_USERNAME, DB_USERNAME, DB_PASSWORD);
} catch   (PDOException $e) {
    print "Error!: " . $e->getMessage() . "<br/>";
    die();
}


  $book =$_GET["book_id"];
  $user =$_GET["user"];


$sth = $dbh->prepare("SELECT title, price FROM books2 WHERE b_id=$book");
$sth->bindParam(':title', $title);
$sth->bindParam(':price', $price);
$sth->execute();




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


$item1 = new Item();
$item1->setName($title)
    ->setCurrency('USD')
    ->setQuantity(1)
    ->setPrice($price);



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




$transaction = new Transaction();
$transaction->setAmount($price)
    ->setItemList($item1)
    ->setDescription("Payment description")
    ->setInvoiceNumber(uniqid());



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

    $execution = new PaymentExecution();
$result = $payment->execute($execution, $apiContext);


$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("Setting up payment using Paypal. Please visit the URL to Approve.", "Payment", "<a href='$approvalUrl' >$approvalUrl</a>", $request, $payment);

return $payment;

Answer 1

获得 $approvalUrl 后，您需要 将他们重定向到 PayPal 网址。它会 看起来像这样。

$approvalUrl = $payment->getApprovalLink();  
if(isset($approvalUrl)) {
    header("Location: $approvalUrl");
    exit;
}