Google API PHP Client - Firebase Cloud Messaging Service v1 example

send.php

<?php

/**
 * This serves as an example of how to use the Google API PHP Client 
 * with Firebase Cloud Messaging Service.
 *
 * The client can be found here:
 * https://github.com/google/google-api-php-client
 *
 * At the time of writing this, there's no Service object for the correct 
 * scope for Firebase Messaging, so here's an example of how this can be
 * done with provididing the scope manually.
 *
 * Info regarding authorization and requests can be found here:
 * https://firebase.google.com/docs/cloud-messaging/server
 */

require 'vendor/autoload.php';

$client = new Google_Client();

// Authentication with the GOOGLE_APPLICATION_CREDENTIALS environment variable
$client->useApplicationDefaultCredentials(); 

// Alternatively, provide the JSON authentication file directly.
$client->setAuthConfig(__DIR__.'/auth.json');

// Add the scope as a string (multiple scopes can be provided as an array)
$client->addScope('https://www.googleapis.com/auth/firebase.messaging');

// Returns an instance of GuzzleHttp\Client that authenticates with the Google API.
$httpClient = $client->authorize();

// Your Firebase project ID
$project = "myproject-4e6ed";

// Creates a notification for subscribers to the debug topic
$message = [
    "message" => [
        "topic" => "debug",
        "notification" => [
            "body" => "This is an FCM notification message!",
            "title" => "FCM Message",
        ]
    ]
];

// Send the Push Notification - use $response to inspect success or errors
$response = $httpClient->post("https://fcm.googleapis.com/v1/projects/{$project}/messages:send", ['json' => $message]);

Is this code still working? I don't know why but I constantly get error 401 Unautorized .. :|

This was helpful.
Download and install composer then use windows powershell to use composer.
composer require google/apiclient:"^2.0"

Make sure to use your service account json file which contains the private key.
From your filebase console->settings->service account

There is an issue with the guzzle
ErrorException/app/vendor/guzzlehttp/guzzle/src/Handler/CurlFactory.php

The solution:
#replace this
if (count($this->handles) >= $this->maxHandles)
#with this
if ( $this->handles != null && count($this->handles) >= $this->maxHandles )

in the file on line 67, and everything works like a charm.

Thanks a lot!
I was trying to do it with GoogleApi docs but google documentation sometimes so quirky.. )

Thanks! It works. But i have issues to send message to web app running on Firefox and Edge. Send to chrome is fine. Any one have any clue?

Thank you.. it help me a lot. =)

How to use multiple device tokens here?

How to use multiple device tokens here?

Hey @akshaywo

The solution proposed in this Gist is a couple of years old, I wouldn't recommend this approach anymore.

The package from krait called firebase-php is what I would recommend these days as this package easily solves what you need, also sending to multiple device tokens.

Quick and easy implementation too:

use Kreait\Firebase\Factory;
use Kreait\Firebase\Messaging\CloudMessage;
use Kreait\Firebase\Messaging\Notification;

$factory = (new Factory)->withServiceAccount(base_path('service_account_credentials.json')); // or use auto-loading of credentials

$messaging = $factory->createMessaging();

$message = CloudMessage::withTarget('topic', 'debug')
                ->withNotification(Notification::create('Notification title', 'This is an FCM notification message!'));

$messaging->send($message);

Thank you so much for your reply! It helps a lot.

Thanks a lot! Very helpful !

Thanks a lot, @Repox! I've been looking for something similar without any luck. You nailed it.

Hi @Repox ,

Thanks for your code, what is the json file ?

I tried your code in a function but nothing is returned.

`function notifPushEnvoi ($regid, $title, $body, $id) {

require 'vendor/autoload.php';

$client = new Google_Client();

$client->useApplicationDefaultCredentials(); 

$client->setAuthConfig('mon.json');

$client->addScope('https://www.googleapis.com/auth/firebase.messaging');

$httpClient = $client->authorize();

$project = "monprojet";

// Creates a notification for subscribers to the debug topic
$message = [
	"message" => [
		"token" => $regid,
		//"topic" => "debug",
		"notification" => [
			"body" => $body,
			"title" => $title
		]
	]
];

// Send the Push Notification - use $response to inspect success or errors
$response = $httpClient->post("https://fcm.googleapis.com/v1/projects/$project/messages:send", ['json' => $message]);
	
return (json_encode($response));`

Hi @BenLaKnet

Thanks for your code, what is the json file ?

Tje JSON file is a file containing your credentials for the service account.

You can read more from Google's official documentation on that topic. How to create and download the JSON credentials file.

I tried your code in a function but nothing is returned.

I see you tried my original Gist; it no longer works. You should try and look at the updated example I made three years ago, which still works:

https://gist.github.com/Repox/64ac4b3582f8ac42a6a1b41667db7440?permalink_comment_id=3440955#gistcomment-3440955

@Repox , I am on a share hosting, how could I install firebase-php ? or how I can use "use" in your example ?
Many thanks

@BenLaKnet , you can install it locally with composer or download the zip package from the repository. After that, upload it to your shared hosting, like you normally would.

@Repox ,
So sorry, but I can not understand where scripts firebase-php are included, with use ? or namespace or other ?
May I declarde a variable in shared hosting ?

I am using v6.9.6 with php 7.4 on my shared hosting.

require_once "common.php";

use Kreait\Firebase\Factory;
use Kreait\Firebase\Messaging\CloudMessage;
use Kreait\Firebase\Messaging\Notification;


function notifPushEnvoi_FirebaseAPI ($regid, $title, $body, $id) {
	
	$factory = (new Factory)->withServiceAccount(base_path('*****.json')); // or use auto-loading of credentials

	$messaging = $factory->createMessaging();

	$message = CloudMessage::withTarget('topic', 'debug')
					->withNotification(Notification::create('Notification title', 'This is an FCM notification message!'));

	$messaging->send($message);
	
	return (true);
	
}

Uncaught Error: Class 'Kreait\Firebase\Factory' not found in //testsnotifs.php:16 Stack trace: #0 //testsnotifs.php(91): notifPushEnvoi_FirebaseAPI('d7-so8quEvo:APA...', 'Alors...', 'Goooooo', 1) #1 {main} thrown in /****/testsnotifs.php on line 16

Ok, so sorry, I understood why using composer.

Many thanks.

@Repox ,

I used Composer to install locally, but with PHP 8.2
My shared hosting is PHP 7.4, I can not migrate at this time, because I encounteer an error 500.

How is it possible to download locally firebase-php with PHP 7.4 ?

I install a virtual machine with PHP 7.4 locally to obtain firebase-php 6.9.6 and now:

composer require "kreait/firebase-php:6.9.6"

PHP Fatal error:  Uncaught Error: Call to undefined function Symfony\Component\Console\str_contains() in /usr/share/php/Symfony/Component/Console/Application.php:860
Stack trace:
#0 /usr/share/php/Symfony/Component/Console/Application.php(840): Symfony\Component\Console\Application->doRenderThrowable()
#1 /usr/share/php/Symfony/Component/Console/Application.php(154): Symfony\Component\Console\Application->renderThrowable()
#2 [internal function]: Symfony\Component\Console\Application->Symfony\Component\Console\{closure}()
#3 {main}
  thrown in /usr/share/php/Symfony/Component/Console/Application.php on line 860

@Repox ,

Finally, I migrated PHP8.2, reinstall with composer and it is running.

Many thanks.