与Paypal IPN交易后发送电子邮件

<?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\";

// If testing on Sandbox use: 
// $header .= \"Host: www.sandbox.paypal.com:443\\r\\n\";
$header .= \"Host: www.paypal.com:443\\r\\n\";
$header .= \"Content-Type: application/x-www-form-urlencoded\\r\\n\";
$header .= \"Content-Length: \" . strlen($req) . \"\\r\\n\\r\\n\";

// If testing on Sandbox use:
//$fp = fsockopen (\'ssl://www.sandbox.paypal.com\', 443, $errno, $errstr, 30);
$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\'];


//transaction ID
$txn_id = $_POST[\'txn_id\'];


//ATEKDesign
$business = $_POST[\'business\'];

//payer email
$payer_email = $_POST[\'payer_email\'];

//create payer name
$payer_firstname = $_POST[\'first_name\'];
$payer_lastname = $_POST[\'last_name\'];
$payer_name = $payer_firstname . \" \" . $payer_lastname;

//create payer address
$name = $_POST[\'address_name\'];
$street = $_POST[\'address_street\'];
$city = $_POST[\'address_city\'];
$state = $_POST[\'address_state\'];
$zip = $_POST[\'address_zip\'];

$address = \"$name \\n $street \\n $city $state $zip\";









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

                            $mail_From = \"From: me@mybiz.com\";
                            $mail_To = \"atekdesigns@gmail.com\";
                            $mail_Subject = \"VERIFIED IPN\";
                            $mail_Body = \"Hello $payer_ name , thank you for purchasing the $item_name from $buisness , your order ID is as follows: $txn_id; . \\n We will be using $payer_email to contact you and will be sending you item to $address\";
                            $emailtext = blank;



                            mail($mail_To, $mail_Subject, $emailtext . \"\\n\\n\" . $mail_Body, $mail_From);

                        }