php - PHP 中的 PayPal IPN 与数据库的值集成

Question

我在一个 paypal 表单中有 3 个文本框输入和 paypal 按钮。

<form action="https://www.sandbox.paypal.com/cgi-bin/webscr" method="post" target="_top">
     <input  type="text" name="a_name" id="name" placeholder="Artist name" />
                   <input  type="email" name="email" id="name" placeholder="Email" />
                  <input  type="text" name="url" id="email" placeholder="Url of your soundcloud track" />
<input type="hidden" name="cmd" value="_s-xclick">
<input type="hidden" name="hosted_button_id" value="NUYMPHY8BXZGN">
<input type="image" src="https://www.sandbox.paypal.com/nl_NL/NL/i/btn/btn_buynowCC_LG.gif" border="0" name="submit" alt="PayPal, de veilige en complete manier van online betalen.">
<img alt="" border="0" src="https://www.sandbox.paypal.com/nl_NL/i/scr/pixel.gif" width="1" height="1">
</form>

填写完所有内容后，我们将被重定向到 paypal。我的 Paypal IPN 监听器:

<?php
// CONFIG: Enable debug mode. This means we'll log requests into 'ipn.log' in the same directory.
// Especially useful if you encounter network errors or other intermittent problems with IPN (validation).
// Set this to 0 once you go live or don't require logging.
define("DEBUG", 1);
// Set to 0 once you're ready to go live
define("USE_SANDBOX", 1);
define("LOG_FILE", "./ipn.log");
// Read POST data
// reading posted data directly from $_POST causes serialization
// issues with array data in POST. Reading raw POST data from input stream instead.
$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";
}
// Post IPN data back to PayPal to validate the IPN data is genuine
// Without this step anyone can fake IPN data
if(USE_SANDBOX == true) {
    $paypal_url = "https://www.sandbox.paypal.com/cgi-bin/webscr";
} else {
    $paypal_url = "https://www.paypal.com/cgi-bin/webscr";
}
$ch = curl_init($paypal_url);
if ($ch == FALSE) {
    return FALSE;
}
curl_setopt($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);
if(DEBUG == true) {
    curl_setopt($ch, CURLOPT_HEADER, 1);
    curl_setopt($ch, CURLINFO_HEADER_OUT, 1);
}
// CONFIG: Optional proxy configuration
//curl_setopt($ch, CURLOPT_PROXY, $proxy);
//curl_setopt($ch, CURLOPT_HTTPPROXYTUNNEL, 1);
// Set TCP timeout to 30 seconds
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 30);
curl_setopt($ch, CURLOPT_HTTPHEADER, array('Connection: Close'));
// CONFIG: Please download 'cacert.pem' from "http://curl.haxx.se/docs/caextract.html" and set the directory path
// of the certificate as shown below. Ensure the file is readable by the webserver.
// This is mandatory for some environments.
//$cert = __DIR__ . "./cacert.pem";
//curl_setopt($ch, CURLOPT_CAINFO, $cert);
$res = curl_exec($ch);
if (curl_errno($ch) != 0) // cURL error
    {
    if(DEBUG == true) { 
        error_log(date('[Y-m-d H:i e] '). "Can't connect to PayPal to validate IPN message: " . curl_error($ch) . PHP_EOL, 3, LOG_FILE);
    }
    curl_close($ch);
    exit;
} else {
        // Log the entire HTTP response if debug is switched on.
        if(DEBUG == true) {
            error_log(date('[Y-m-d H:i e] '). "HTTP request of validation request:". curl_getinfo($ch, CURLINFO_HEADER_OUT) ." for IPN payload: $req" . PHP_EOL, 3, LOG_FILE);
            error_log(date('[Y-m-d H:i e] '). "HTTP response of validation request: $res" . PHP_EOL, 3, LOG_FILE);
        }
        curl_close($ch);
}
// Inspect IPN validation result and act accordingly
// Split response headers and payload, a better way for strcmp
$tokens = explode("\r\n\r\n", trim($res));
$res = trim(end($tokens));
if (strcmp ($res, "VERIFIED") == 0) {
    $a_name = $_POST['a_name'];

$email = $_POST['email'];
$url = $_POST['url'];
    // Insert your actions here
require('connect.php');

$sql = "INSERT INTO reposts (a_name, url, email) VALUES ('".$a_name."','".$email."','".$url."')";   
mysqli_query($conn, $sql);


    if(DEBUG == true) {
        error_log(date('[Y-m-d H:i e] '). "Verified IPN: $req ". PHP_EOL, 3, LOG_FILE);
    }
} else if (strcmp ($res, "INVALID") == 0) {
    // log for manual investigation
    // Add business logic here which deals with invalid IPN messages
    if(DEBUG == true) {
        error_log(date('[Y-m-d H:i e] '). "Invalid IPN: $req" . PHP_EOL, 3, LOG_FILE);
    }
}
?>

当我模拟它正在工作的 IPN 监听器时，我在数据库中插入了值(当然是空的，因为我们没有 $a_name $email 等)，因此它通过了付款。当我在网站上采取这些步骤时，也会发生这种情况。文本框中的值丢失了。我无法在我的 payment.php(监听器)中检索它们。

支付成功后如何获取值并插入数据库？我只是将空值插入到数据库中。

---

已解决!

我所做的是在付款后通过 IPN 监听器将 $_POST 值发送到我的电子邮件中。我收到的是这样的:

:11:"verify_sign";s:56:"AnNMT7nRteKS2auTkxdsRz9rRvvPAWwWAsbZm21nF1AGuSAtUwoLbcd";s:11:"payer_email";s:20:"stan-buyer@stwebs.nl";s:12:"option_name1 ";s:8:"segujejg";s:12:"option_name2";s:16:"stan@hotmail.com";s:12:"option_name3";s:9:"jsipegjie"; s:6:"txn_id";s:17:"61S77153EE2897129";s:12:"payment_type

它成功接收了值，所以我唯一要做的就是将 $_POST['a_name'] 替换为 $_POST['option_name1'] 作为它从 Paypal 返回。现在可以了。

Answer 1

Paypal IPN 有一个 custom 变量，您可以使用它向 Paypal 发送自定义值，然后 Paypal 会将其发回给您。但它只有一个字段，并且限制为 255 个字符。 https://developer.paypal.com/docs/classic/ipn/integration-guide/IPNandPDTVariables/

所以在您的情况下，也许您可​​以尝试将表单放在一页上。用户提交“姓名”、“电子邮件”和“网址”后，将它们插入数据库，获取行的 ID，然后在下一个屏幕上插入 Paypal 按钮，使用行的 ID 填充“自定义”隐藏输入字段，您的 IPN 监听器将收到返回的 ID(在 custom var 中)，因此您可以检查数据库。