Current File : /var/www/html/itworks/wp-content/plugins/learnpress/inc/gateways/paypal/paypal-ipn/ipn.php
<?php
/**
* PHP-PayPal-IPN Example
*
* This shows a basic example of how to use the IpnListener() PHP class to
* implement a PayPal Instant Payment Notification (IPN) listener script.
*
* For a more in depth tutorial, see my blog post:
* http://www.micahcarrick.com/paypal-ipn-with-php.html
*
* This code is available at github:
* https://github.com/Quixotix/PHP-PayPal-IPN
*
* @package PHP-PayPal-IPN
* @author Micah Carrick
* @copyright (c) 2011 - Micah Carrick
* @license http://opensource.org/licenses/gpl-3.0.html
*/
/*
Since this script is executed on the back end between the PayPal server and this
script, you will want to log errors to a file or email. Do not try to use echo
or print--it will not work!
Here I am turning on PHP error logging to a file called "ipn_errors.log". Make
sure your web server has permissions to write to that file. In a production
environment it is better to have that log file outside of the web root.
*/
ini_set('log_errors', true);
ini_set('error_log', dirname(__FILE__).'/ipn_errors.log');
// instantiate the IpnListener class
include('ipnlistener.php');
$listener = new IpnListener();
/*
When you are testing your IPN script you should be using a PayPal "Sandbox"
account: https://developer.paypal.com
When you are ready to go live change use_sandbox to false.
*/
$listener->use_sandbox = true;
/*
By default the IpnListener object is going going to post the data back to PayPal
using cURL over a secure SSL connection. This is the recommended way to post
the data back, however, some people may have connections problems using this
method.
To post over standard HTTP connection, use:
$listener->use_ssl = false;
To post using the fsockopen() function rather than cURL, use:
$listener->use_curl = false;
*/
/*
The processIpn() method will encode the POST variables sent by PayPal and then
POST them back to the PayPal server. An exception will be thrown if there is
a fatal error (cannot connect, your server is not configured properly, etc.).
Use a try/catch block to catch these fatal errors and log to the ipn_errors.log
file we setup at the top of this file.
The processIpn() method will send the raw data on 'php://input' to PayPal. You
can optionally pass the data to processIpn() yourself:
$verified = $listener->processIpn($my_post_data);
*/
try {
$listener->requirePostMethod();
$verified = $listener->processIpn();
} catch (Exception $e) {
error_log($e->getMessage());
exit(0);
}
/*
The processIpn() method returned true if the IPN was "VERIFIED" and false if it
was "INVALID".
*/
if ($verified) {
/*
Once you have a verified IPN you need to do a few more checks on the POST
fields--typically against data you stored in your database during when the
end user made a purchase (such as in the "success" page on a web payments
standard button). The fields PayPal recommends checking are:
1. Check the $_POST['payment_status'] is "Completed"
2. Check that $_POST['txn_id'] has not been previously processed
3. Check that $_POST['receiver_email'] is your Primary PayPal email
4. Check that $_POST['payment_amount'] and $_POST['payment_currency']
are correct
Since implementations on this varies, I will leave these checks out of this
example and just send an email using the getTextReport() method to get all
of the details about the IPN.
*/
mail('YOUR EMAIL ADDRESS', 'Verified IPN', $listener->getTextReport());
} else {
/*
An Invalid IPN *may* be caused by a fraudulent transaction attempt. It's
a good idea to have a developer or sys admin manually investigate any
invalid IPN.
*/
mail('YOUR EMAIL ADDRESS', 'Invalid IPN', $listener->getTextReport());
}
?>
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