Question

成功付款后，详细信息将插入数据库中，但是第一次显示该页面时，付款ID不会显示，仅当我刷新 success.php 页面时，该信息才会显示从 PayPal 交易完成页面重定向后，第一次没有显示付款ID。

付款成功后会显示

Success.php 。成功页面上会显示一条消息，提示您的付款成功和付款ID。

我已启用 IPN ，并在 success.php 中注释掉了插入查询，该插入由ipn.php页面中的插入查询处理。如果我取消注释 success.php 中的插入查询，则不会出现此问题，但是由于启用了IPN，所以我让IPN处理它。

ipn.php $last_insert_id = $db->insert_id;的末尾有一个代码 last_insert_id是我需要在成功付款后显示在success.php上的付款ID，为此，我在success.php中包括了ipn.php文件，以便它可以访问该变量。

success.php

<?php
    include 'dbConfig.php';
    //Get payment information from PayPal
    $item_number = $_GET['item_number']; 
    $txn_id = $_GET['tx'];
    $payment_gross = $_GET['amt'];
    $currency_code = $_GET['cc'];
    $payment_status = $_GET['st'];

    //Get product price from database
    $productResult = $db->query("SELECT price FROM products WHERE id = ".$item_number);
    $productRow = $productResult->fetch_assoc();
    $productPrice = $productRow['price'];

    if(!empty($txn_id) && $payment_gross == $productPrice){
        //Check if payment data exists with the same TXN ID.
        $prevPaymentResult = $db->query("SELECT payment_id FROM payments WHERE txn_id = '".$txn_id."'");

        if($prevPaymentResult->num_rows > 0){
            $paymentRow = $prevPaymentResult->fetch_assoc();
            $last_insert_id = $paymentRow['payment_id'];
        }else{
            //Insert tansaction data into the database
           /* $insert = $db->query("INSERT INTO payments(item_number,txn_id,payment_gross,currency_code,payment_status) VALUES('".$item_number."','".$txn_id."','".$payment_gross."','".$currency_code."','".$payment_status."')");
            $last_insert_id = $db->insert_id;*/
        }
    ?>

        <h1>Your payment has been successful.</h1>
        <?php include 'ipn.php'; ?>
        <h1>Your Payment ID - <?php echo $last_insert_id; ?></h1>
    <?php }else{ ?>
        <h1>Your payment has failed.</h1>
    <?php } ?>

ipn.php

    <?php 
    //Include DB configuration file
    include 'dbConfig.php';

    /*
     * 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
 */
$paypalURL = "https://www.sandbox.paypal.com/cgi-bin/webscr";
$ch = curl_init($paypalURL);
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_SSLVERSION, 6);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 1);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 2);
curl_setopt($ch, CURLOPT_FORBID_REUSE, 1);

// Set TCP timeout to 30 seconds
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 30);
curl_setopt($ch, CURLOPT_HTTPHEADER, array('Connection: Close', 'User-Agent: company-name'));
$res = curl_exec($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($res, "VERIFIED") == 0 || strcasecmp($res, "VERIFIED") == 0) {

    //Payment data
    $item_number = $_POST['item_number'];
    $txn_id = $_POST['txn_id'];
    $payment_gross = $_POST['mc_gross'];
    $currency_code = $_POST['mc_currency'];
    $payment_status = $_POST['payment_status'];

    //Check if payment data exists with the same TXN ID.
    $prevPayment = $db->query("SELECT payment_id FROM payments WHERE txn_id = '".$txn_id."'");
    if($prevPayment->num_rows > 0){
        exit();
    }else{
        //Insert tansaction data into the database
        $insert = $db->query("INSERT INTO payments(item_number,txn_id,payment_gross,currency_code,payment_status) VALUES('".$item_number."','".$txn_id."','".$payment_gross."','".$currency_code."','".$payment_status."')");
       $last_insert_id = $db->insert_id;
    }

}

Paypal集成-付款ID仅在刷新成功页面后才会显示

0 个答案: