Question

我正在使用我的网站设置paypal IPN，以便登录的用户可以购买积分。我已经有会话和登录和$ id变量，什么不是，我不需要任何帮助。我需要有关paypal IPN方面的帮助。所以，到目前为止我所拥有的通知网址也是我在paypal帐户上设置的。这是通知网址：

    $raw_post_data = file_get_contents('php://input');
$raw_post_array = explode('&', $raw_post_data);
$myPost = array();
foreach ($raw_post_array as $keyval) {
  $keyval = explode ('=', $keyval);
  if (count($keyval) == 2)
     $myPost[$keyval[0]] = urldecode($keyval[1]);
}
// read the post from PayPal system and add 'cmd'
$req = 'cmd=_notify-validate';
if(function_exists('get_magic_quotes_gpc')) {
   $get_magic_quotes_exists = true;
} 
foreach ($myPost as $key => $value) {        
   if($get_magic_quotes_exists == true && get_magic_quotes_gpc() == 1) { 
        $value = urlencode(stripslashes($value)); 
   } else {
        $value = urlencode($value);
   }
   $req .= "&$key=$value";
}


// STEP 2: Post IPN data back to paypal to validate

$ch = curl_init('https://www.paypal.com/cgi-bin/webscr'); // change to [...]sandbox.paypal[...] when using sandbox to test
curl_setopt($ch, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $req);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 1);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 2);
curl_setopt($ch, CURLOPT_FORBID_REUSE, 1);
curl_setopt($ch, CURLOPT_HTTPHEADER, array('Connection: Close'));

// In wamp like environments that do not come bundled with root authority certificates,
// please download 'cacert.pem' from "http://curl.haxx.se/docs/caextract.html" and set the directory path 
// of the certificate as shown below.
// curl_setopt($ch, CURLOPT_CAINFO, dirname(__FILE__) . '/cacert.pem');
if( !($res = curl_exec($ch)) ) {
    // error_log("Got " . curl_error($ch) . " when processing IPN data");
    curl_close($ch);
    exit;
}
curl_close($ch);


// STEP 3: Inspect IPN validation result and act accordingly

if (strcmp ($res, "VERIFIED") == 0) {
    // check whether the payment_status is Completed
    // check that txn_id has not been previously processed
    // check that receiver_email is your Primary PayPal email
    // check that payment_amount/payment_currency are correct
    // process payment

    // assign posted variables to local variables
    $item_name = $_POST['item_name'];
    $item_number = $_POST['item_number'];
    $payment_status = $_POST['payment_status'];
    if ($_POST['mc_gross'] != NULL)
        $payment_amount = $_POST['mc_gross'];
    else
        $payment_amount = $_POST['mc_gross1'];
    $payment_currency = $_POST['mc_currency'];
    $txn_id = $_POST['txn_id'];
    $receiver_email = $_POST['receiver_email'];
    $payer_email = $_POST['payer_email'];
    $custom = $_POST['custom'];

    // Insert your actions here

    if ($payment_status = "Completed") 
        {
        // my sql statement to update the points will go here, I don't need help
        // with that
        }

    if ($txn_id)
    {

    }

} else if (strcmp ($res, "INVALID") == 0) {
    // log for manual investigation
}

所以这似乎设置正确，没有错误，我要添加的SQL语句在我测试时工作得很好等等。我唯一的问题是付款。我不知道如何让用户付费。我知道如何设置paypal API并将paypal付款与我的网站集成...是我必须做的事情？如果没有，那么我如何允许用户输入自定义金额，让他们付款，然后他们的付款将由通知网址自动验证？这个问题似乎相当广泛，但我不是要求任何人为我编写免费代码。我只是想找个人指出我正确的方向，因为我已经搜索了这么长时间并且很难找到这些信息，我似乎无法找到它。非常感谢所有帮助！谢谢:)）

Answer 1

IPN是一种交易后处理工具。它本身并不实际处理事务（除非您碰巧在您的IPN脚本中完成了自己的API集成。）

所以，是的，您需要使用Payments Standard，Express Checkout / Pro或任何您熟悉的实际将付款部分绑定到您的网站。然后，一旦付款，它将相应地触发IPN。

如何使用paypal IPN设置付款

1 个答案: