README

PHP library for the WhatsApp API.

Designed for modern PHP (8.2+) with clean architecture in mind. This library is HTTP client-agnostic—it works seamlessly with Guzzle, Symfony HTTP Client, or any other PSR-18 implementation.

🚀 Features (MVP)

• ✅ Send Text Messages
• ✅ Full PSR-7, PSR-17, and PSR-18 compliance
• ✅ Strict Types & Readonly Properties (PHP 8.2)
• ✅ Zero-config instantiation (via HTTP Discovery)
• ✅ Immutability (Immutable DTOs)

📦 Requirements

• PHP ^8.2
• Composer
• An HTTP Client library (e.g., Guzzle, Symfony HttpClient)

📥 Installation

Install the library via Composer:

composer require juszczyk/whatsapp-php-client

Installing an HTTP Client

This library relies on the php-http/discovery abstraction. If your project does not strictly require a specific HTTP client yet, we recommend installing Guzzle:

composer require guzzlehttp/guzzle

⚡ Quick Start

The easiest way to instantiate the client is using the ClientFactory. It automatically discovers the installed HTTP client and factories.

use Juszczyk\WhatsApp\Factory\ClientFactory;
use Juszczyk\WhatsApp\Message\TextMessage;

require 'vendor/autoload.php';

// 1. Configuration (Token and Phone Number ID from Meta Developers panel)
$token = 'EAAG...'; 
$phoneId = '105...';

$whatsapp = ClientFactory::create($token, $phoneId);

// Recipient's phone number (with country code, no plus sign)
$message = new TextMessage('48123456789', 'Hello! This is a test from PHP SDK.');

try {
    $response = $whatsapp->send($message);
    echo "Message sent! ID: " . $response['messages'][0]['id'];
} catch (\Exception $e) {
    echo "Error: " . $e->getMessage();
}

🏗️ Architecture & Dependency Injection

If you are using a framework (like Laravel or Symfony) and want to inject your own configured HTTP client (e.g., with a Logger or Retry Middleware), you can bypass the Factory and use the Constructor directly.

use Juszczyk\WhatsApp\Client;
use Juszczyk\WhatsApp\Config;

$config = new Config($token, $phoneId);

// You can inject any PSR-18 Client & PSR-17 Factory implementation here
$client = new Client($config, $httpClient, $requestFactory, $streamFactory);

🧪 Testing

This library comes with a set of unit tests using PHPUnit.

composer test
# or
vendor/bin/phpunit

Static analysis (PHPStan):

vendor/bin/phpstan analyse

🗺️ Roadmap

Current version is an MVP. Planned features:

• Media Messages (Images, Documents)
• Template Messages
• Interactive Messages (Buttons, Lists)
• Webhooks support

📄 License

This library is licensed under the MIT License. See the LICENSE file for details.