Paypal记录未插入数据库PHP IPN

Question

我是php的新手。刚刚发布了一个关于我的查询的问题，该问题无法添加到数据库中。结果我混合了程序和OOP PHP。无论如何，善良的SO用户帮助我并修复了查询。

现在可以正确插入查询 - 自行

然而，当与其他IPN代码放在一起时，它无法正常工作。

我正在使用沙盒帐户进行测试购买，每次购买表明它已经完成，但我的数据库中没有任何反应。 即使我知道插入查询有效

<?php
    include 'connect.php';
    // 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

    $ch = curl_init('https://www.sanpaypal.com/cgi-bin/webscr');
    curl_setopt($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
        $item_name = $_POST['item_name'];
        $item_number = $_POST['item_number'];
        $payment_status = $_POST['payment_status'];
        $payment_amount = $_POST['mc_gross'];
        $payment_currency = $_POST['mc_currency'];
        $txn_id = $_POST['txn_id'];
        $receiver_email = $_POST['receiver_email'];
        $payer_email = $_POST['payer_email'];
        $id = $_POST['custom'];

            if($payment_status=="Completed"){

            $txn_id_check = $mysqli->query("SELECT `transaction_id` FROM `payment` WHERE `transaction_id`='$txn_id'");
            if($txn_id_check->num_rows != 1) {

                        // add txn_id to db
                        $query = "INSERT INTO `payment` (`transaction_id`, `payment_status`, `users_id`) VALUES(?, ?, ?)";
                        $statement = $mysqli->prepare($query);
                        $statement->bind_param('ssi',$txn_id, $payment_status, $id);
                        if($statement->execute()){
                        print 'Success! ID of last inserted record is : ' .$statement->insert_id .'<br />'; 
                        }else{
                        die('Error : ('. $mysqli->errno .') '. $mysqli->error);
                        }
                        $statement->close();
                        // update premium to 1 

                        //$update_premium = mysqli_query("UPDATE 'users' SET is_member ='1' WHERE 'id' ='".$id."'");


            }
        }



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