使用贝宝结账将用户添加到sql数据库

我正在尝试创建一个php文件，该文件将由贝宝结账调用，并将人员的电子邮件和密码添加到sql数据库中，以便他们可以登录。

我在网上找到了一个文件，但我让我的按钮把客户发给了它。但我一定做错了什么。

如有任何帮助，我们将不胜感激。

    <?php
// read the post from PayPal system and add 'cmd'
$req = 'cmd=_notify-validate';
foreach ($_POST as $key => $value) {
$value = urlencode(stripslashes($value));
$req .= "&$key=$value";
}
// post back to PayPal system to validate
$header .= "POST /cgi-bin/webscr HTTP/1.0'r'n";
$header .= "Content-Type: application/x-www-form-urlencoded'r'n";
$header .= "Content-Length: " . strlen($req) . "'r'n'r'n";
$fp = fsockopen ('ssl://www.paypal.com', 443, $errno, $errstr, 30);
// 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'];
$password = crypt($_POST['os0']);
if (!$fp) {
// HTTP ERROR
} else {
fputs ($fp, $header . $req);
while (!feof($fp)) {
$res = fgets ($fp, 1024);
if (strcmp ($res, "VERIFIED") == 0) {
// check 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
    $table = "checkout";
    include("checkout-config.php");
 // Connect to Mysql Database
mysql_connect("$dbhost","$dblogin","$dbpass");
mysql_select_db($dbname) or die("Unable to select database");
mysql_query("INSERT INTO $table
(email, password) VALUES ('$_GET[payer_email]', '$password')");
echo "Paid";
//Header( "Location: http://www.rollestonelectric.com/paid.php" );
}
else if (strcmp ($res, "INVALID") == 0) {
echo "Unpaid";
//Header( "Location: http://www.rollestonelectric.com/unpaid.php" );
// log for manual investigation
}
}
fclose ($fp);
}