Hand fcm

<?php
require_once __DIR__ . '/vendor/autoload.php';

use phpFCMv1\Client;
use phpFCMv1\Notification;
use phpFCMv1\Recipient;

$client = new Client('service_account.json');
$recipient = new Recipient();
$notification = new Notification();

$recipient -> setSingleRecipient('DEVICE_TOKEN');
$notification -> setNotification('NOTIFICATION_TITILE', 'NOTIFICATION_BODY');
$client -> build($recipient, $notification);
$client -> fire();
?>