Omnipay

An easy to use, consistent payment processing library for PHP 5.3+

Omnipay is a payment processing library for PHP. It has been designed based on ideas from Active Merchant, plus experience implementing dozens of gateways for [CI Merchant]. It has a clear and consistent API, is fully unit tested, and even comes with an example application to get you started.

Why use Omnipay instead of a gateway's official PHP package/example code?

• Because you can learn one API and use it in multiple projects using different payment gateways
• Because if you need to change payment gateways you won't need to rewrite your code
• Because most official PHP payment gateway libraries are a mess
• Because most payment gateways have exceptionally poor documentation
• Because you are writing a shopping cart and need to support multiple gateways

Important Note: Compatibility with Symfony 3 Event Dispatcher

If you are using Symfony 3 (or Symfony 3 components), please note that Omnipay 2.x still relies on Guzzle3, which in turn depends on symfony/event-dispatcher 2.x. This conflicts with Symfony 3 (standard install), so cannot be installed. Development for Omnipay 3.x is still in progress at the moment.

If you are just using the Symfony 3 components (eg. stand-alone or Silex/Laravel etc), you could try to force the install of symfony/event-dispatcher:^2.8, which is compatible with both Symfony 3 components and Guzzle 3.

composer require symfony/event-dispatcher:^2.8

TL;DR

Just want to see some code?

use Omnipay\Omnipay;

$gateway = Omnipay::create('Stripe');
$gateway->setApiKey('abc123');

$formData = array('number' => '4242424242424242', 'expiryMonth' => '6', 'expiryYear' => '2016', 'cvv' => '123');
$response = $gateway->purchase(array('amount' => '10.00', 'currency' => 'USD', 'card' => $formData))->send();

if ($response->isSuccessful()) {
    // payment was successful: update database
    print_r($response);
} elseif ($response->isRedirect()) {
    // redirect to offsite payment gateway
    $response->redirect();
} else {
    // payment failed: display message to customer
    echo $response->getMessage();
}

As you can see, Omnipay has a consistent, well thought out API. We try to abstract as much as possible the differences between the various payments gateways.

Package Layout

Omnipay is a collection of packages which all depend on the omnipay/common package to provide a consistent interface. There are no dependencies on official payment gateway PHP packages - we prefer to work with the HTTP API directly. Under the hood, we use the popular and powerful Guzzle library to make HTTP requests.

New gateways can be created by cloning the layout of an existing package. When choosing a name for your package, please don't use the omnipay vendor prefix, as this implies that it is officially supported. You should use your own username as the vendor prefix, and prepend omnipay- to the package name to make it clear that your package works with Omnipay. For example, if your GitHub username was santa, and you were implementing the giftpay payment library, a good name for your composer package would be santa/omnipay-giftpay.

Installation

Omnipay is installed via Composer. For most uses, you will need to require an individual gateway:

composer require omnipay/paypal:~2.0

To install all officially supported gateways:

composer require omnipay/omnipay:~2.0

This will require ALL ~25 Omnipay gateways and is generally discouraged.

Payment Gateways

All payment gateways must implement GatewayInterface, and will usually extend AbstractGateway for basic functionality.

The following gateways are available:

Gateway	Composer Package	Maintainer
2Checkout	omnipay/2checkout	Omnipay
2Checkout Improved	collizo4sky/omnipay-2checkout	Agbonghama Collins
Agms	agmscode/omnipay-agms	Maanas Royy
Alipay(Global)	lokielse/omnipay-global-alipay	Loki Else
Alipay	lokielse/omnipay-alipay	Loki Else
Allied Wallet	delatbabel/omnipay-alliedwallet	Del
Authorize.Net	omnipay/authorizenet	Jason Judge
Barclays ePDQ	samvaughton/omnipay-barclays-epdq	Sam Vaughton
Beanstream	lemonstand/omnipay-beanstream	LemonStand
BKM Express	yasinkuyu/omnipay-bkm	Yasin Kuyu
Braintree	omnipay/braintree	Omnipay
Buckaroo	omnipay/buckaroo	Omnipay
CardGate	cardgate/omnipay-cardgate	CardGate
CardSave	omnipay/cardsave	Omnipay
Checkout.com	fotografde/checkoutcom	fotograf.de
Coinbase	omnipay/coinbase	Omnipay
CoinGate	coingate/omnipay-coingate	CoinGate
Creditcall	meebio/omnipay-creditcall	John Jablonski
Cybersource	dioscouri/omnipay-cybersource	Dioscouri Design
Cybersource SOAP	dabsquared/omnipay-cybersource-soap	DABSquared
DataCash	coatesap/omnipay-datacash	Andrew Coates
Dummy	omnipay/dummy	Del
ecoPayz	dercoder/omnipay-ecopayz	Alexander Fedra
EgopayRu	pinguinjkeke/omnipay-egopaymentru	Alexander Avakov
Elavon	lemonstand/omnipay-elavon	LemonStand
eWAY	omnipay/eway	Del
Fasapay	andreas22/omnipay-fasapay	Andreas Christodoulou
Fat Zebra	delatbabel/omnipay-fatzebra	Del
First Data	omnipay/firstdata	Andrew Coates
Flo2cash	guisea/omnipay-flo2cash	Aaron Guise
Globalcloudpay	dercoder/omnipay-globalcloudpay	Alexander Fedra
GoCardless	omnipay/gocardless	Del
GovPayNet	omnipay/omnipay-govpaynet	[FlexCoders] (https://github.com/flexcoders)
GVP (Garanti)	yasinkuyu/omnipay-gvp	Yasin Kuyu
Helcim	academe/omnipay-helcim	Jason Judge
IfthenPay	ifthenpay/omnipay-ifthenpay	Rafael Almeida
Iyzico	yasinkuyu/omnipay-iyzico	Yasin Kuyu
Komerci (Rede, former RedeCard)	byjg/omnipay-komerci	João Gilberto Magalhães
Komoju	vink/omnipay-komoju	Danny Vink
Manual	omnipay/manual	Del
Migs	omnipay/migs	Omnipay
Mollie	omnipay/mollie	Barry vd. Heuvel
MOLPay	leesiongchan/molpay	Lee Siong Chan
MultiCards	incube8/omnipay-multicards	Del
MultiSafepay	omnipay/multisafepay	Alexander Deruwe
NestPay (EST)	yasinkuyu/omnipay-nestpay	Yasin Kuyu
Netaxept (BBS)	omnipay/netaxept	Omnipay
Netbanx	omnipay/netbanx	Maks Rafalko
Neteller	alfaproject/omnipay-neteller	João Dias
NetPay	netpay/omnipay-netpay	NetPay
Network Merchants Inc. (NMI)	mfauveau/omnipay-nmi	Matthieu Fauveau
Pacnet	mfauveau/omnipay-pacnet	Matthieu Fauveau
Pagar.me	descubraomundo/omnipay-pagarme	Descubra o Mundo
PayFast	omnipay/payfast	Omnipay
Payflow	omnipay/payflow	Del
PaymentExpress (DPS)	omnipay/paymentexpress	Del
PaymentgateRu	pinguinjkeke/omnipay-paymentgateru	Alexander Avakov
PaymentSense	coatesap/omnipay-paymentsense	Andrew Coates
PaymentWall	incube8/omnipay-paymentwall	Del
PayPal	omnipay/paypal	Del
PayPro	paypronl/omnipay-paypro	Fruitcake Studio
PAYONE	academe/omnipay-payone	Jason Judge
Paysafecard	dercoder/omnipay-paysafecard	Alexander Fedra
Paysera	povils/omnipay-paysera	Povils
PayTrace	softcommerce/omnipay-paytrace	Oleg Ilyushyn
PayU	omnipay/payu	efesaid
Pin Payments	omnipay/pin	Del
Portmanat	dercoder/omnipay-portmanat	Alexander Fedra
Posnet	yasinkuyu/omnipay-posnet	Yasin Kuyu
Postfinance	bummzack/omnipay-postfinance	Roman Schmid
Realex	coatesap/omnipay-realex	Andrew Coates
RedSys	nazka/sermepa-omnipay	Javier Sampedro
RentMoola	rentmoola/omnipay-rentmoola	Geoff Shaw
Sage Pay	omnipay/sagepay	Jason Judge
SecPay	justinbusschau/omnipay-secpay	Justin Busschau
SecurePay	omnipay/securepay	Omnipay
Secure Trading	meebio/omnipay-secure-trading	John Jablonski
Sisow	fruitcakestudio/omnipay-sisow	Fruitcake Studio
Skrill	alfaproject/omnipay-skrill	João Dias
Sofort	aimeoscom/omnipay-sofort	Aimeos GmbH
Stripe	omnipay/stripe	Del
TargetPay	omnipay/targetpay	Alexander Deruwe
UnionPay	lokielse/omnipay-unionpay	Loki Else
Vantiv	lemonstand/omnipay-vantiv	LemonStand
Veritrans	andylibrian/omnipay-veritrans	Andy Librian
Vindicia	vimeo/omnipay-vindicia	Vimeo
WebMoney	dercoder/omnipay-webmoney	Alexander Fedra
WeChat	labs7in0/omnipay-wechat	7IN0's Labs
WechatPay	lokielse/omnipay-wechatpay	Loki Else
WePay	collizo4sky/omnipay-wepay	Agbonghama Collins
Wirecard	igaponov/omnipay-wirecard	Igor Gaponov
WorldPay	omnipay/worldpay	Omnipay
WorldPay XML Direct	teaandcode/omnipay-worldpay-xml	Dave Nash
Yandex.Money	aTastyCookie/yandexmoney_omnipay	Roman Ananyev

Gateways are created and initialized like so:

use Omnipay\Omnipay;

$gateway = Omnipay::create('PayPal_Express');
$gateway->setUsername('adrian');
$gateway->setPassword('12345');

Most settings are gateway specific. If you need to query a gateway to get a list of available settings, you can call getDefaultParameters():

$settings = $gateway->getDefaultParameters();
// default settings array format:
array(
    'username' => '', // string variable
    'testMode' => false, // boolean variable
    'landingPage' => array('billing', 'login'), // enum variable, first item should be treated as default
);

Generally most payment gateways can be classified as one of two types:

• Off-site gateways such as PayPal Express, where the customer is redirected to a third party site to enter payment details
• On-site (merchant-hosted) gateways such as PayPal Pro, where the customer enters their credit card details on your site

However, there are some gateways such as Sage Pay Direct, where you take credit card details on site, then optionally redirect if the customer's card supports 3D Secure authentication. Therefore, there is no point differentiating between the two types of gateway (other than by the methods they support).

Credit Card / Payment Form Input

User form input is directed to an CreditCard object. This provides a safe way to accept user input.

The CreditCard object has the following fields:

• firstName
• lastName
• number
• expiryMonth
• expiryYear
• startMonth
• startYear
• cvv
• issueNumber
• type
• billingAddress1
• billingAddress2
• billingCity
• billingPostcode
• billingState
• billingCountry
• billingPhone
• shippingAddress1
• shippingAddress2
• shippingCity
• shippingPostcode
• shippingState
• shippingCountry
• shippingPhone
• company
• email

Even off-site gateways make use of the CreditCard object, because often you need to pass customer billing or shipping details through to the gateway.

The CreditCard object can be initialized with untrusted user input via the constructor. Any fields passed to the constructor which are not recognized will be ignored.

$formInputData = array(
    'firstName' => 'Bobby',
    'lastName' => 'Tables',
    'number' => '4111111111111111',
);
$card = new CreditCard($formInputData);

You can also just pass the form data array directly to the gateway, and a CreditCard object will be created for you.

CreditCard fields can be accessed using getters and setters:

$number = $card->getNumber();
$card->setFirstName('Adrian');

If you submit credit card details which are obviously invalid (missing required fields, or a number which fails the Luhn check), InvalidCreditCardException will be thrown. You should validate the card details using your framework's validation library before submitting the details to your gateway, to avoid unnecessary API calls.

For on-site payment gateways, the following card fields are generally required:

• firstName
• lastName
• number
• expiryMonth
• expiryYear
• cvv

You can also verify the card number using the Luhn algorithm by calling Helper::validateLuhn($number).

Gateway Methods

The main methods implemented by gateways are:

• authorize($options) - authorize an amount on the customer's card
• completeAuthorize($options) - handle return from off-site gateways after authorization
• capture($options) - capture an amount you have previously authorized
• purchase($options) - authorize and immediately capture an amount on the customer's card
• completePurchase($options) - handle return from off-site gateways after purchase
• refund($options) - refund an already processed transaction
• void($options) - generally can only be called up to 24 hours after submitting a transaction
• acceptNotification() - convert an incoming request from an off-site gateway to a generic notification object for further processing

On-site gateways do not need to implement the completeAuthorize and completePurchase methods. Gateways that don't receive payment notifications don't need to implement acceptNotification. If any gateway does not support certain features (such as refunds), it will throw BadMethodCallException.

All gateway methods except acceptNotification take an $options array as an argument. The acceptNotification method does not take any parameters and will access the HTTP URL variables or POST data implicitly. Each gateway differs in which parameters are required, and the gateway will throw InvalidRequestException if you omit any required parameters. All gateways will accept a subset of these options:

• card
• token
• amount
• currency
• description
• transactionId
• clientIp
• returnUrl
• cancelUrl

Pass the options through to the method like so:

$card = new CreditCard($formData);
$request = $gateway->authorize(array(
    'amount' => '10.00', // this represents $10.00
    'card' => $card,
    'returnUrl' => 'https://www.example.com/return',
));

When calling the completeAuthorize or completePurchase methods, the exact same arguments should be provided as when you made the initial authorize or purchase call (some gateways will need to verify for example the actual amount paid equals the amount requested). The only parameter you can omit is card.

To summarize the various parameters you have available to you:

• Gateway settings (e.g. username and password) are set directly on the gateway. These settings apply to all payments, and generally you will store these in a configuration file or in the database.
• Method options are used for any payment-specific options, which are not set by the customer. For example, the payment amount, currency, transactionId and returnUrl.
• CreditCard parameters are data which the user supplies. For example, you want the user to specify their firstName and billingCountry, but you don't want a user to specify the payment currency or returnUrl.

The Payment Response

The payment response must implement ResponseInterface. There are two main types of response:

• Payment was successful (standard response)
• Website requires redirect to off-site payment form (redirect response)

Successful Response

For a successful responses, a reference will normally be generated, which can be used to capture or refund the transaction at a later date. The following methods are always available:

$response = $gateway->purchase(array('amount' => '10.00', 'card' => $card))->send();

$response->isSuccessful(); // is the response successful?
$response->isRedirect(); // is the response a redirect?
$response->getTransactionReference(); // a reference generated by the payment gateway
$response->getTransactionId(); // the reference set by the originating website if available.
$response->getMessage(); // a message generated by the payment gateway

In addition, most gateways will override the response object, and provide access to any extra fields returned by the gateway.

Redirect Response

The redirect response is further broken down by whether the customer's browser must redirect using GET (RedirectResponse object), or POST (FormRedirectResponse). These could potentially be combined into a single response class, with a getRedirectMethod().

After processing a payment, the cart should check whether the response requires a redirect, and if so, redirect accordingly:

$response = $gateway->purchase(array('amount' => '10.00', 'card' => $card))->send();
if ($response->isSuccessful()) {
    // payment is complete
} elseif ($response->isRedirect()) {
    $response->redirect(); // this will automatically forward the customer
} else {
    // not successful
}

The customer isn't automatically forwarded on, because often the cart or developer will want to customize the redirect method (or if payment processing is happening inside an AJAX call they will want to return JS to the browser instead).

To display your own redirect page, simply call getRedirectUrl() on the response, then display it accordingly:

$url = $response->getRedirectUrl();
// for a form redirect, you can also call the following method:
$data = $response->getRedirectData(); // associative array of fields which must be posted to the redirectUrl

Error Handling

You can test for a successful response by calling isSuccessful() on the response object. If there was an error communicating with the gateway, or your request was obviously invalid, an exception will be thrown. In general, if the gateway does not throw an exception, but returns an unsuccessful response, it is a message you should display to the customer. If an exception is thrown, it is either a bug in your code (missing required fields), or a communication error with the gateway.

You can handle both scenarios by wrapping the entire request in a try-catch block:

try {
    $response = $gateway->purchase(array('amount' => '10.00', 'card' => $card))->send();
    if ($response->isSuccessful()) {
        // mark order as complete
    } elseif ($response->isRedirect()) {
        $response->redirect();
    } else {
        // display error to customer
        exit($response->getMessage());
    }
} catch (\Exception $e) {
    // internal error, log exception and display a generic message to the customer
    exit('Sorry, there was an error processing your payment. Please try again later.');
}

Token Billing

Token billing allows you to store a credit card with your gateway, and charge it at a later date. Token billing is not supported by all gateways. For supported gateways, the following methods are available:

• createCard($options) - returns a response object which includes a cardReference, which can be used for future transactions
• updateCard($options) - update a stored card, not all gateways support this method
• deleteCard($options) - remove a stored card, not all gateways support this method

Once you have a cardReference, you can use it instead of the card parameter when creating a charge:

$gateway->purchase(array('amount' => '10.00', 'cardReference' => 'abc'));

Recurring Billing

At this stage, automatic recurring payments functionality is out of scope for this library. This is because there is likely far too many differences between how each gateway handles recurring billing profiles. Also in most cases token billing will cover your needs, as you can store a credit card then charge it on whatever schedule you like. Feel free to get in touch if you really think this should be a core feature and worth the effort.

Incoming Notifications

Some gateways (e.g. Cybersource, GoPay) offer HTTP notifications to inform the merchant about the completion (or, in general, status) of the payment. To assist with handling such notifications, the acceptNotification() method will extract the transaction reference and payment status from the HTTP request and return a generic NotificationInterface.

$notification = $gateway->acceptNotification();

$notification->getTransactionReference(); // A reference provided by the gateway to represent this transaction
$notification->getTransactionStatus(); // Current status of the transaction, one of NotificationInterface::STATUS_*
$notification->getMessage(); // Additional message, if any, provided by the gateway

// update the status of the corresponding transaction in your database

Example Application

An example application is provided in the omnipay/example repo. You can run it using PHP's built in web server (PHP 5.4+):

$ php composer.phar update --dev
$ php -S localhost:8000

For more information, see the Omnipay example application.

Support

If you are having general issues with Omnipay, we suggest posting on Stack Overflow. Be sure to add the omnipay tag so it can be easily found.

If you want to keep up to date with release anouncements, discuss ideas for the project, or ask more detailed questions, there is also a mailing list which you can subscribe to.

If you believe you have found a bug, please report it using the GitHub issue tracker for the appropriate package, or better yet, fork the library and submit a pull request.

Security

If you discover any security related issues, please email [email protected] instead of using the issue tracker.

Feedback

Please provide feedback! We want to make this library useful in as many projects as possible. Please head on over to the mailing list and point out what you do and don't like, or fork the project and make suggestions. No issue is too small.