<?php
use Genkgo\Push\Body;
use Genkgo\Push\Firebase\CloudMessaging;
use Genkgo\Push\Gateway;
use Genkgo\Push\Message;
use Genkgo\Push\Sender\FirebaseSender;
use Genkgo\Push\Sender\GoogleGcmSender;
use Genkgo\Push\Sender\AppleApnSender;
use Genkgo\Push\Recipient\AndroidDeviceRecipient;
use Genkgo\Push\Recipient\AppleDeviceRecipient;
use Genkgo\Push\Recipient\FirebaseRecipient;

// construct the gateway, using the different senders
$gateway = new Gateway([
    GoogleGcmSender::fromApiKey('API key obtained through the Google API Console'),
    AppleApnSender::fromCertificate('/location/to/cert.pem', 'passphrase'),
    new FirebaseSender(new CloudMessaging($guzzleClient, $auth), 'fcm-project-id')
]);

// below message will automatically go to their own specific sender
$gateway->send(new Message(new Body('message content')), new AndroidDeviceRecipient('token'));
$gateway->send(new Message(new Body('message content')), new AppleDeviceRecipient('token'));
$gateway->send(new Message(new Body('message content')), new FirebaseRecipient('token'));

<?php
use Genkgo\Push\Certificate\Apple\Generator;
use Genkgo\Push\Certificate\Apple\PortalConnection;
use Genkgo\Push\Certificate\Apple\Type;
use GuzzleHttp\Client;

$generator = new Generator(new PortalConnection(new Client(), $appleId, $password, $teamId));
$pushCertificate = $generator->generate(new Type(Type::DEVELOPMENT), 'your app identifier');
file_put_contents('location/to/file.pem', (string) $pushCertificate);