Is there a FCM Service in Google API PHP Client Services - php

Question

I have looked through Github but could not find any related class or documentation.
https://github.com/google/google-api-php-client-services/tree/master/src/Google/Service
I am trying to send an FCM message from the server to a web client. Below is how I am currently achieving that.
<?php
header('Content-Type: text/json');
$data = array(
'message' => array(
'notification' => array(
'title' => 'FCM Message',
'body' => 'This is an FCM Message',
)
)
);
$server_key = 'ya29.ElqKBGN2Ri_Uz...HnS_uNreA';
$url = 'https://fcm.googleapis.com/fcm/send';
$headers = 'Authorization:key = '.$firebase_api_key."\r\n".'Content-Type: application/json'."\r\n".'Accept: application/json'."\r\n";
$registration_ids = array('bk3RNwTe3H0:CI2k_HHwgIpoDKCIZvvDMExUdFQ3P1...');
$fields = array('registration_ids' => $registration_ids, 'data' => $data);
$content = json_encode($fields);
$context = array('http' => array( 'method' => 'POST', 'header' => $headers, 'content' => $content));
$context = stream_context_create($context);
$response = file_get_contents($url, false, $context);
print($response);
But I am hoping there is a Google Service I can use for the sake of future compatibility. See the example below.
<?php
header('Content-Type: text/json');
require_once __DIR__.'/vendor/autoload.php';
putenv('GOOGLE_APPLICATION_CREDENTIALS=/path/to/service-account.json');
$client = new Google_Client();
$client->useApplicationDefaultCredentials();
$data = array(
'message' => array(
'notification' => array(
'title' => 'FCM Message',
'body' => 'This is an FCM Message',
),
'token': 'bk3RNwTe3H0:CI2k_HHwgIpoDKCIZvvDMExUdFQ3P1...'
)
);
$fcm = new Google_Service_FirebaseCloudMessaging($client);
$response = $fcm->send($data);
print($response);

Answer 1

First generate a private key file for your service account:
In the Firebase console, open Settings > Service Accounts (https://console.firebase.google.com/project/_/settings/serviceaccounts/adminsdk).
Click Generate New Private Key, and confirm by clicking Generate Key.
Securely store the JSON file containing the key.
See: https://firebase.google.com/docs/cloud-messaging/migrate-v1
Install the Google Client PHP sources via composer
$ composer require google/apiclient
Now use the API
<?php
require __DIR__ . '/vendor/autoload.php';
putenv('GOOGLE_APPLICATION_CREDENTIALS=' . __DIR__ . '/api-project-1234567-firebase-adminsdk-abcdefg.json');
$client = new \Google_Client();
$client->useApplicationDefaultCredentials();
$client->addScope('https://www.googleapis.com/auth/firebase.messaging');
$http_client = $client->authorize();
$message = [
'message' => [
'token' => 'dG****:****r9jM',
'notification' => [
'body' => 'This is an FCM notification message!',
'title' => 'FCM Message',
],
],
];
$project = 'api-project-1234567';
// Send the Push Notification - use $response to inspect success or errors
$response = $http_client->post("https://fcm.googleapis.com/v1/projects/{$project}/messages:send", ['json' => $message]);
echo (string)$response->getBody() . PHP_EOL;
Of course you have to replace the token with the receiver token, the credentials file with that one you have downloaded in the first step and the project with your project id.
I found the solution here: https://gist.github.com/Repox/64ac4b3582f8ac42a6a1b41667db7440

Answer 2

The FCM Service has been added on 2019-05-17 update
https://github.com/googleapis/google-api-php-client-services/commit/29cd38940096a3e973ad348d69101d1c2f1526d8#diff-dfabf19b00a6fe639dc70ab311952848