README.md

Firebase Cloud Messaging via REST API using PHP

This repository contains a PHP script to send Firebase Cloud Messages (FCM) via the REST API. It includes both the generation of an OAuth2 access token using a Google service account key and the sending of FCM messages.

Instructions

1. Clone the Repository

   git clone https://github.com/tharushaudana/fcm-send-with-oauth2-php.git

2. Edit Service Account Key Path

   In access_token.php, replace the placeholder with the path to your Google service account key JSON file:

   $creds = file_get_contents('path/to/your/service-account-key.json');

3. Edit FCM Data

   In index.php, edit the FCM data to suit your needs. Change the validate_only parameter to true if you only want to validate the request without sending a message:

   $firebase_data = [
       'validate_only' => false,
       'message' => [
           'topic' => 'user_4',
           'notification' => [
               'title' => 'test title',
               'body' => 'test body',
           ],
           'android' => [
               'collapse_key' => 'type_a',
           ],
           'data' => [
               'test' => 'test value'
           ]
       ]
   ];

4. Load index.php Using a Web Server

   Ensure you are running a web server, then load index.php to send the FCM message.

Generating and Downloading the Google Service Account Key

The screenshots below will help you create and download the Google service account key JSON for your Firebase project:

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I hope this helps you implement the latest FCM send method via the REST API.