README

Server-side library for working with the Expo Push service using PHP 8.2+

⚙ Installation

Requirements

• PHP 8.2+
• PHP Zlib extension

Instructions

Install the library with composer:

composer require dru1x/expo-server-sdk-php 

🚀 Usage

First, instantiate the ExpoPush service:

use Dru1x\ExpoPush\ExpoPush;

$expoPush = new ExpoPush();

If additional security is being used, the access token can be supplied as an argument to the constructor:

use Dru1x\ExpoPush\ExpoPush;

$accessToken = 'NTLyMHB2vtZ1lWhgP0sjWJTOCed9zspT';
$expoPush    = new ExpoPush($accessToken);

Sending Push Notifications

Push notifications can be sent by supplying a PushMessageCollection, or an array of PushMessage objects, to the sendNotifications() method. This automatically chunks the given push messages into an appropriate number of requests and sends them concurrently to Expo's Push API. The max request size, concurrency limit and rate limit are applied as set out in Expo's Push API documentation. Therefore, the maximum throughput of this method is 600 notifications per second.

use Dru1x\ExpoPush\PushError\PushErrorCollection;
use Dru1x\ExpoPush\PushMessage\PushMessageCollection;
use Dru1x\ExpoPush\PushMessage\PushMessage;
use Dru1x\ExpoPush\PushTicket\PushTicketCollection;
use Dru1x\ExpoPush\PushToken\PushToken;

// This could also be an array of PushMessage objects
$messages = new PushMessageCollection(
    new PushMessage(
        to: new PushToken('ExponentPushToken[xxxxxxxxxxxxxxxxxxxxxx]'),
        title: 'Hello',
        body: 'This is a push notification' 
    )
);

$result = $expoPush->sendNotifications($messages);

/** @var PushTicketCollection $tickets */
$tickets = $result->tickets;

/** @var PushErrorCollection|null $errors */
$errors = $result->errors;

The SendNotificationsResult object returned by sendNotifications() contains a collection of all the resulting PushTicket objects, as well as a collection of PushError objects representing any request-level errors encountered while sending the given batch of notifications.

The PushTicketCollection is ordered according to the order of the PushMessage objects passed in to sendNotifications(). Each PushTicket will either be a SuccessfulPushTicket or a FailedPushTicket, the latter representing a ticket that was returned with a status of "error".

If errors were encountered, they will be present in the PushErrorCollection, and the PushTicketCollection will have a gap in its keys that corresponds to the failed chunk of notifications. Inspect the errors to find out what went wrong.

Checking Tickets

Once notifications have been sent, Expo recommends that notification outcomes are checked. This is done by fetching PushReceipt objects, each identified by an ID included in a previously returned PushTicket.

Receipts can be fetched by supplying a PushReceiptIdCollection, or an array of push receipt ID strings, to the getReceipts() method. This also automatically chunks the given receipt IDs into an appropriate number of requests and sends them concurrently to the Expo Push API.

Expo recommends that this is done between 15 minutes and 24 hours after notifications were sent.

use Dru1x\ExpoPush\PushError\PushErrorCollection;
use Dru1x\ExpoPush\PushReceipt\PushReceiptIdCollection;
use Dru1x\ExpoPush\PushReceipt\PushReceiptCollection;

// This could also be an array of receipt ID strings
$receiptIds = new PushReceiptIdCollection(
    'XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX',
    'YYYYYYYY-YYYY-YYYY-YYYY-YYYYYYYYYYYY',
);

$result = $expoPush->getReceipts($receiptIds);

/** @var PushReceiptCollection $receipts */
$receipts = $result->receipts;

/** @var PushErrorCollection|null $errors */
$errors = $result->errors;

The GetReceiptsResult object returned by getReceipts() contains a collection of the resulting PushReceipt objects, as well as a collection of PushError objects representing any request-level errors encountered while getting the given batch of receipts.

The PushReceiptCollection respects the order of receipts returned by the Expo Push API. To find a specific receipt in the collection, the getById() method can be used. Each PushReceipt with either be a SuccessfulPushReceipt or a FailedPushReceipt, the latter representing a receipt that was returned with a status of "error".

If errors were encountered, they will be present in the PushErrorCollection, and the PushReceiptCollection will have a gap in its keys that corresponds to the failed chunk of notifications. Inspect the errors to find out what went wrong.

Further Information

More detailed information about Expo's Push API can be found on their documentation website.

💬 Support

Please report any problems by submitting an issue. Ensure that the problem is well-described and can be replicated by others. All issues will be reviewed as soon as is reasonably possible.

🤝 Contributing

Thank you for considering contributing! Please open a pull request, ensuring that test coverage is maintained or increased with any proposed changes. All pull requests will be reviewed as soon as is reasonably possible.

📄 License

Expo Push Server SDK (PHP) is open-sourced software licensed under the MIT licence.