Send your Firebase notifications with PHP

Firebase.php

<?php
/**
 * Created by PhpStorm.
 * User: celalettinyilmaz
 * Date: 11.02.2021
 * Time: 12:17
 */

namespace App\Services\Firebase;



use App\Services\Firebase\Exception\FirebaseSendNotificationError;
use App\Services\Firebase\Http\Request;
use GuzzleHttp\Client;

class Firebase
{
    public $server_token;
    public $client;
    public $firebase_url = 'https://fcm.googleapis.com/fcm/send';
    const HTTP_OK = 200;

    public function __construct($server_token)
    {
        $this->server_token = $server_token;
        $this->client = new Client();
    }

    public function sendNotification($to, $title, $body)
    {
        $response = $this->client->post($this->firebase_url,
            [
                'headers' => [
                    'Authorization' => 'key=' .$this->server_token,
                    'Content-Type' => 'application/json'
                ],
                'body' => json_encode([
                    'registration_ids' => [$to],
                    'notification' => [
                        'title' => $title,
                        'body' => $body
                    ]
                ])
            ]
        );
        if($response->getStatusCode() != static::HTTP_OK){
            throw new FirebaseSendNotificationError('Something wrong please report this issue. Response code is : '. $response->getStatusCode() . ' Response Body : '. $response->getBody());
        }

        return true;
    }
}