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PHP Firebase Notification (OOP)

A clean PHP OOP implementation for sending Firebase Cloud Messaging (FCM) notifications using Service Account + OAuth2 Bearer Token, without using Composer.

This project is Docker-ready and fully configurable for multiple environments.

Features

  • Pure OOP PHP structure
  • Firebase OAuth2 token generation using Service Account JSON
  • Automatic token refresh
  • Supports single device notifications
  • Data payload values automatically converted to strings (required by FCM)
  • Docker-ready
  • JSON output for API-friendly responses
  • Easy to extend for multi-device or topic notifications

Project Structure

  • src/
    • config/
      • FirebaseConfig.php: Firebase configuration
    • classes/
      • FirebaseService.php: OAuth2 token handling
      • FirebaseNotification.php: Notification sending
    • send.php: Example entry point