PayPal IPN變量不添加和更新

Question

我有一個PayPal IPN腳本獲取成功傳輸的事務數據並將其存儲在MySQL表中。但我想在我的網站中添加該交易的PayPal金額與成員的當前餘額。

<?php 
session_start(); 
if (!isset($_SESSION['Email'])) { 
header('Location: mainerror.php'); 
} 
$Email=$_SESSION['Email']; 
    $connn = mysql_connect("localhost","******","*******"); 
if (!$connn) 
    { 
    die('Could not connect: ' . mysql_error()); 
    } 

mysql_select_db("********", $connn); 
     $result1 = mysql_query("SELECT * from members WHERE Email='$Email' "); 
//Use the mysql_fetch_array function on the resource returned by the mysql_query 
$row1 = mysql_fetch_assoc($result1); 
$old = $row1['balance']; 
// STEP 1: Read POST data 

// reading posted data from 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"; 
} 


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

$ch = curl_init('https://www.sandbox.paypal.com/cgi-bin/webscr'); 
curl_setopt($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 
    $payment_currency = $_POST['mc_currency']; 
    $txn_id = $_POST['txn_id']; 
$address_zip = $_POST['address_zip']; 
$address_country = $_POST['address_country_code']; 
$payment_date = $_POST['payment_date']; 
    $payer_email = $_POST['payer_email']; 
    $first_name = $_POST['first_name']; 
    $last_name = $_POST['last_name']; 
    $item_name = $_POST['item_name']; 
    $item_number = $_POST['item_number']; 
    $payment_status = $_POST['payment_status']; 
    $payment_amount = $_POST['mc_gross']; 


$con=mysqli_connect("localhost","******","******","*******"); 

// Check connection 
if (mysqli_connect_errno()) 
    { 
    echo "Failed to connect to MySQL: " . mysqli_connect_error(); 
    } 

mysqli_query($con,"INSERT INTO sales (item_name, item_number, payment_status, mc_gross, mc_currency, txn_id, payer_email, first_name, last_name, payment_date, address_zip, address_country) 
VALUES ('$item_name', '$item_number', '$payment_status', '$payment_amount', '$payment_currency', '$txn_id', '$payer_email', '$first_name', '$last_name', '$payment_date', '$address_zip', '$address_country')"); 

$new = ($old + $payment_amount); 
mysqli_query($con,"UPDATE members SET balance='$new' 
WHERE Email='$payer_email'"); 
mysqli_close($con); 

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

我想從交易中添加作爲$ payment_amount的當前會員數量的$舊金額。但我終於只在會員表中獲得更新的$ payment_amount。

Answer 1

因爲它似乎$old變量不定義任何地方我會有不同的方法。你的插入查詢後，我就從members表老去量，然後用新的數據更新，成纔像

$query = mysqli_query($con,"SELECT balance FROM members WHERE Email='$payer_email'"); 
if($row = mysqli_fetch_array($query)) 
{ 
    $sql = mysqli_query($con, "UPDATE members SET balance = '".$row['balance'] + $payment_amount."' WHERE Email = '$payer_email'"); 
} 

，使代碼看起來像

mysqli_query($con,"INSERT INTO sales (item_name, item_number, payment_status, mc_gross, mc_currency, txn_id, payer_email, first_name, last_name, payment_date, address_zip, address_country) VALUES ('$item_name', '$item_number', '$payment_status', '$payment_amount', '$payment_currency', '$txn_id', '$payer_email', '$first_name', '$last_name', '$payment_date', '$address_zip', '$address_country')"); 

$query = mysqli_query($con,"SELECT balance FROM members WHERE Email='$payer_email'"); 
if($row = mysqli_fetch_array($query)) 
{ 
    $sql = mysqli_query($con, "UPDATE members SET balance = '".$row['balance'] + $payment_amount."' WHERE Email = '$payer_email'"); 
} 

mysqli_close($con); 

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