这是我的PayPal退货页面。在此页面上，我想捕获事务的详细信息，并将详细信息插入到正常工作的数据库中。不幸的是，在处理完所有内容后，页面不会重定向到成功页面（paypal_success.php）。 我做得不对？
这是我的代码：
<?php
ob_start();
/*database variables*/
$host="localhost";
$db_username="myusername";
$password="mypassword";
$db="mydb";
/*tables*/
$tbl_users="users";
$tbl_orders="orders";
$tbl_attachments="attachments";
$tbl_admin_attachments = "admin_attachments";
$tbl_payments = "payments";
/*paypal identity token*/
$paypal_identity_token = 'myidtoken';
$dbc=new mysqli("$host","$db_username","$password","$db");
if($dbc->connect_errno > 0){
die('Unable to connect '.$dbc->connect_errno);
}
include 'core/general.functions.php';
include 'core/users.functions.php';
// The unique transaction id.
if(isset($_GET['tx'])){
$tx= $_GET['tx'];
}
$identity =$paypal_identity_token;
// Init curl
$ch = curl_init();
// Set request options
curl_setopt_array($ch, array ( CURLOPT_URL => 'https://www.sandbox.paypal.com/cgi-bin/webscr',
CURLOPT_POST => TRUE,
CURLOPT_POSTFIELDS => http_build_query(array
(
'cmd' => '_notify-synch',
'tx' => $tx,
'at' => $identity,
)),
CURLOPT_RETURNTRANSFER => TRUE,
CURLOPT_HEADER => FALSE,
// CURLOPT_SSL_VERIFYPEER => TRUE,
// CURLOPT_CAINFO => 'cacert.pem',
));
// Execute request and get response and status code
$response = curl_exec($ch);
$status = curl_getinfo($ch, CURLINFO_HTTP_CODE);
// Close connection
curl_close($ch);
if($status == 200 AND strpos($response, 'SUCCESS') === 0)
{
// parse the data
$lines = explode("\n", $response);
$keyarray = array();
if(strcmp ($lines[0], "SUCCESS") == 0){
for ($i=1; $i<count($lines);$i++){
list($key,$val) = explode("=", $lines[$i]);
$keyarray[urldecode($key)] = urldecode($val);
}//for
$firstname = $keyarray['first_name'];
$lastname = $keyarray['last_name'];
$amount = $keyarray['payment_gross'];
$user_id = $keyarray['custom'];
$order_id = $keyarray['item_name'];
$trx_id = $keyarray['txn_id'];
$currency = $keyarray['mc_currency'];
$payment_status = $keyarray['payment_status'];
$payer_email = $keyarray['payer_email'];
// check whether the payment_status is Completed
// check that txn_id has not been previously processed
//insert the payment record into the db
if($payment_status == 'Completed' && check_txn_id($trx_id,$dbc,$tbl_payments) == false){
insert_payments($amount,$currency,$user_id,$order_id,$trx_id,$dbc,$tbl_payments);
//update payment order status
update_payment_status($order_id,$user_id,$dbc,$tbl_orders);
header('location:paypal_success.php?success');
}
}else if(strcmp ($lines[0], "FAIL") == 0) {
}
}
$dbc->close();
?>