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akamenew/paypal-ipn-listener
============================

A PayPal IPN (Instant Payment Notification) listener for PHP 8

016PHP

Since Jan 28Pushed 2y agoCompare

[ Source](https://github.com/akamenew/paypal-ipn-listener)[ Packagist](https://packagist.org/packages/akamenew/paypal-ipn-listener)[ RSS](/packages/akamenew-paypal-ipn-listener/feed)WikiDiscussions master Synced 1mo ago

READMEChangelogDependenciesVersions (1)Used By (0)

PayPal IPN Listener
===================

[](#paypal-ipn-listener)

[![Packagist Version](https://camo.githubusercontent.com/db5097b48de8eded8dbef5ecd0cc3e4325bf99d6e7b6d37979a4bd7728e76edf/68747470733a2f2f696d672e736869656c64732e696f2f7061636b61676973742f762f6d696b65313832756b2f70617970616c2d69706e2d6c697374656e65723f7374796c653d666c61742d737175617265)](https://packagist.org/packages/mike182uk/paypal-ipn-listener)[![Build Status](https://camo.githubusercontent.com/b0cc5800b9c880a6426ceba9abf0bd0fe0004f7f8c387183c04824e984720bfe/68747470733a2f2f696d672e736869656c64732e696f2f6769746875622f616374696f6e732f776f726b666c6f772f7374617475732f6d696b65313832756b2f70617970616c2d69706e2d6c697374656e65722f63692e796d6c3f6272616e63683d6d6173746572267374796c653d666c61742d737175617265)](https://github.com/mike182uk/paypal-ipn-listener/actions/workflows/ci.yml?query=workflow:CI)[![Scrutinizer Quality Score](https://camo.githubusercontent.com/6e34d58240f322f1e3430cd34b69daefa147093142e166fb84546ac6cba810b2/68747470733a2f2f696d672e736869656c64732e696f2f7363727574696e697a65722f672f6d696b65313832756b2f70617970616c2d69706e2d6c697374656e65722e7376673f7374796c653d666c61742d737175617265)](https://scrutinizer-ci.com/g/mike182uk/paypal-ipn-listener/)[![Total Downloads](https://camo.githubusercontent.com/6ea5fba2bddb7d0dd9d0b013cc74cb032e39fb7419755b8f553ae86af8277cd3/68747470733a2f2f696d672e736869656c64732e696f2f7061636b61676973742f64742f6d696b65313832756b2f70617970616c2d69706e2d6c697374656e65723f7374796c653d666c61742d737175617265)](https://packagist.org/packages/mike182uk/paypal-ipn-listener)[![License](https://camo.githubusercontent.com/fe85a90c13878f83a9fbce9afce3fbf09254d526fe113a6c3f7e1dfbf53c54fa/68747470733a2f2f696d672e736869656c64732e696f2f6769746875622f6c6963656e73652f6d696b65313832756b2f70617970616c2d69706e2d6c697374656e65722e7376673f7374796c653d666c61742d737175617265)](https://packagist.org/packages/mike182uk/paypal-ipn-listener)

A PayPal IPN (Instant Payment Notification) listener for PHP

Index
-----

[](#index)

- [Prerequisites](#prerequisites)
- [Installation](#installation)
- [Architecture](#architecture)
- [Usage](#usage)
- [Extending](#extending)
- [Notes](#notes)

Prerequisites
----------------------------------------------------

[](#prerequisites)

1. PHP >=7.1.0
2. A good understanding of how the PayPal Instant Payment Notification system works (see [here](https://developer.paypal.com/docs/ipn/integration-guide/IPNIntro/))

Installation
--------------------------------------------------

[](#installation)

```
composer require mike182uk/paypal-ipn-listener
```

Architecture
--------------------------------------------------

[](#architecture)

This package is made up of several components that work together:

- `Listener` - Listens for and processes the IPN messages
- `Verifier` - Verifies the IPN message with PayPal
- `Service` - Communicates with PayPal
- `Message` - Wrapper around the IPN message
- `MessageFactory` - Creates a new message instance from a data source
- `EventDispatcher` - Dispatches events

The listener creates a `Message` using a `MessageFactory`. The `Message` is passed to the `Verifier` which uses a `Service` to communicate with PayPal. The `Listener` uses the `EventDispatcher` to dispatch events relating to the outcome of the IPN message verification.

The `MessageFactory` and `Service` components are swappable components.

This package provides 2 message factories:

1. `Mdb\PayPal\Ipn\MessageFactory\InputStreamMessageFactory` - Creates a message from the `php://input` stream
2. `Mdb\PayPal\Ipn\MessageFactory\ArrayMessageFactory` - Creates a message from an array passed to the `setData` method

This package provides 1 service:

1. `Mdb\PayPal\Ipn\Service\GuzzleService` - Uses [Guzzle](https://github.com/guzzle/guzzle) to communicate with PayPal

Usage
------------------------------------

[](#usage)

You can either build up the listener object manually or you can use a listener builder. This package provides 2 listener builders:

1. `Mdb\PayPal\Ipn\ListenerBuilder\Guzzle\InputStreamListenerBuilder` - Builds a listener using the guzzle service and the input stream message factory
2. `Mdb\PayPal\Ipn\ListenerBuilder\Guzzle\ArrayListenerBuilder` - Builds a listener using the guzzle service and the array message factory

Using a listener builder is the preferred way of building up a listener object.

### Using a listener builder

[](#using-a-listener-builder)

```
use Mdb\PayPal\Ipn\ListenerBuilder\Guzzle\InputStreamListenerBuilder as ListenerBuilder;

$listener = (new ListenerBuilder)->build();
```

### Building up the listener manually

[](#building-up-the-listener-manually)

```
use GuzzleHttp\Client;
use Mdb\PayPal\Ipn\InputStream;
use Mdb\PayPal\Ipn\Listener;
use Mdb\PayPal\Ipn\MessageFactory\InputStreamMessageFactory;
use Mdb\PayPal\Ipn\Service\GuzzleService;
use Mdb\PayPal\Ipn\Verifier;
use Symfony\Component\EventDispatcher\EventDispatcher;

$service = new GuzzleService(
    new Client(),
    'https://www.sandbox.paypal.com/cgi-bin/webscr'
);

$verifier = new Verifier($service);

$messageFactory = new InputStreamMessageFactory(new InputStream());

$listener = new Listener(
    $messageFactory,
    $verifier,
    new EventDispatcher()
);
```

A lot of plumbing is needed to create the listener manually. The job of the listener builder is to abstract away this logic.

### Subscribing to events

[](#subscribing-to-events)

Once you have created the listener object you can subscribe to the events that it will dispatch:

```
use Mdb\PayPal\Ipn\Event\MessageVerifiedEvent;
use Mdb\PayPal\Ipn\Event\MessageInvalidEvent;
use Mdb\PayPal\Ipn\Event\MessageVerificationFailureEvent;

$listener->onVerified(function (MessageVerifiedEvent $event) {
   $ipnMessage = $event->getMessage();

   // IPN message was verified, everything is ok! Do your processing logic here...
});

$listener->onInvalid(function (MessageInvalidEvent $event) {
   $ipnMessage = $event->getMessage();

   // IPN message was was invalid, something is not right! Do your logging here...
});

$listener->onVerificationFailure(function (MessageVerificationFailureEvent $event) {
    $error = $event->getError();

    // Something bad happend when trying to communicate with PayPal! Do your logging here...
});
```

You can use any [callable](https://php.net/manual/en/language.types.callable.php) when subscribing to an event:

```
class IpnProcessor
{
    public function onVerified(MessageVerifiedEvent $event)
    {
        $message = $event->getMessage();

        // ...
    }
}

$listener->onVerified(array(new IpnProcessor, 'onVerified'));
```

```
class IpnProcessor
{
    public static function onVerified(MessageVerifiedEvent $event)
    {
        $message = $event->getMessage();

        // ...
    }
}

$listener->onVerified(array('IpnProcessor', 'onVerified'));
```

### Listening for IPN messages

[](#listening-for-ipn-messages)

The last thing you need to do to kick of the process is listen for an IPN message:

```
$listener->listen();
```

### Full Example

[](#full-example)

```
use Mdb\PayPal\Ipn\Event\MessageVerifiedEvent;
use Mdb\PayPal\Ipn\Event\MessageInvalidEvent;
use Mdb\PayPal\Ipn\Event\MessageVerificationFailureEvent;
use Mdb\PayPal\Ipn\ListenerBuilder\Guzzle\InputStreamListenerBuilder as ListenerBuilder;

$listener = (new ListenerBuilder)->build();

$listener->onVerified(function (MessageVerifiedEvent $event) {
   $ipnMessage = $event->getMessage();

   // IPN message was verified, everything is ok! Do your processing logic here...
});

$listener->onInvalid(function (MessageInvalidEvent $event) {
   $ipnMessage = $event->getMessage();

   // IPN message was was invalid, something is not right! Do your logging here...
});

$listener->onVerificationFailure(function (MessageVerificationFailureEvent $event) {
    $error = $event->getError();

    // Something bad happend when trying to communicate with PayPal! Do your logging here...
});

$listener->listen();
```

#### Sandbox mode

[](#sandbox-mode)

When using one of the provided listener builders you can set your listener to use PayPal's sandbox for testing purposes:

```
$listenerBuilder = new ListenerBuilder();

$listenerBuilder->useSandbox(); // use PayPal sandbox

$listener = $listenerBuilder->build();
```

You can find some full usage examples in the examples directory.

Extending
--------------------------------------------

[](#extending)

To create your own service you must implement `Mdb\PayPal\Ipn\Service`.

To create your own message factory you must implement `Mdb\PayPal\Ipn\MessageFactory`.

To create your own listener builder it is best to extend `Mdb\PayPal\Ipn\ListenerBuilder` as this provides most of the boilerplate code needed to create a listener builder.

You will notice that when using any of the provided guzzle listener builders that there is a `useSandbox` method exposed. You can add this functionality to your listener builder by using the `Mdb\PayPal\Ipn\ListenerBuilder\ModeDependentServiceEndpoint` trait (see `Mdb\PayPal\Ipn\ListenerBuilder\GuzzleListenerBuilder` for usage example).

Notes
------------------------------------

[](#notes)

### Testing

[](#testing)

PayPal provides an IPN simulator [here](https://developer.paypal.com/dashboard/ipnSimulator).

###  Health Score

15

—

LowBetter than 3% of packages

Maintenance20

Infrequent updates — may be unmaintained

Popularity6

Limited adoption so far

Community14

Small or concentrated contributor base

Maturity19

Early-stage or recently created project

 Bus Factor1

Top contributor holds 90.4% of commits — single point of failure

How is this calculated?**Maintenance (25%)** — Last commit recency, latest release date, and issue-to-star ratio. Uses a 2-year decay window.

**Popularity (30%)** — Total and monthly downloads, GitHub stars, and forks. Logarithmic scaling prevents top-heavy scores.

**Community (15%)** — Contributors, dependents, forks, watchers, and maintainers. Measures real ecosystem engagement.

**Maturity (30%)** — Project age, version count, PHP version support, and release stability.

### Community

Maintainers

![](https://www.gravatar.com/avatar/efde432af6dd43190543583a1193267eb5dd0df19f93f82feeb5d44081f128f3?d=identicon)[amigo](/maintainers/amigo)

---

Top Contributors

[![mike182uk](https://avatars.githubusercontent.com/u/991592?v=4)](https://github.com/mike182uk "mike182uk (141 commits)")[![Swader](https://avatars.githubusercontent.com/u/1430603?v=4)](https://github.com/Swader "Swader (4 commits)")[![mablae](https://avatars.githubusercontent.com/u/389360?v=4)](https://github.com/mablae "mablae (2 commits)")[![dependabot-preview[bot]](https://avatars.githubusercontent.com/in/2141?v=4)](https://github.com/dependabot-preview[bot] "dependabot-preview[bot] (2 commits)")[![dependabot[bot]](https://avatars.githubusercontent.com/in/29110?v=4)](https://github.com/dependabot[bot] "dependabot[bot] (1 commits)")[![omniError](https://avatars.githubusercontent.com/u/1885212?v=4)](https://github.com/omniError "omniError (1 commits)")[![sebdesign](https://avatars.githubusercontent.com/u/667144?v=4)](https://github.com/sebdesign "sebdesign (1 commits)")[![shirshir](https://avatars.githubusercontent.com/u/660457?v=4)](https://github.com/shirshir "shirshir (1 commits)")[![stefanneubig](https://avatars.githubusercontent.com/u/819735?v=4)](https://github.com/stefanneubig "stefanneubig (1 commits)")[![akamenew](https://avatars.githubusercontent.com/u/20927817?v=4)](https://github.com/akamenew "akamenew (1 commits)")[![garyross](https://avatars.githubusercontent.com/u/173042?v=4)](https://github.com/garyross "garyross (1 commits)")

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