README

A PHP WebSocket client for Pusher Channels and Pusher-compatible servers. This is a port of pusher-js implementing Pusher Protocol v7.

When to Use This Package

This package is a low-level WebSocket client for connecting to Pusher-compatible servers from PHP. It's designed for:

• CLI applications that need real-time communication
• Background workers or daemons
• Non-HTTP PHP processes that need WebSocket connections
• Building higher-level abstractions

Laravel users: You probably want artisan-build/resonance instead, which provides Laravel-specific integrations and brings this package as a dependency.

Requirements

• PHP 8.3 or higher
• A Pusher-compatible WebSocket server:
  • Pusher Channels
  • Soketi
  • Laravel Reverb

Installation

composer require artisan-build/pusher-websocket-php

Usage

use ArtisanBuild\Pusher\Pusher;
use ArtisanBuild\Pusher\Options;

$pusher = new Pusher('your-app-key', new Options(
    cluster: 'mt1',
    wsHost: '127.0.0.1',
    wsPort: 6001,
    forceTLS: false,
));

// Subscribe to a channel
$channel = $pusher->subscribe('my-channel');

// Listen for events
$channel->bind('my-event', function ($data) {
    echo "Received: " . json_encode($data) . "\n";
});

// Connect to the server
$pusher->connect();

Subscribing to Channels

// Public channel
$channel = $pusher->subscribe('news');

// Private channel (requires authentication)
$privateChannel = $pusher->subscribe('private-user-123');

// Presence channel (requires authentication)
$presenceChannel = $pusher->subscribe('presence-chat-room');

Binding to Events

// Bind to a specific event
$channel->bind('message', function ($data) {
    // Handle the event
});

// Bind to all events on a channel
$channel->bind_global(function ($event, $data) {
    echo "Event: {$event}\n";
});

// Unbind
$channel->unbind('message');

Configuration Options

new Options(
    cluster: 'mt1',           // Pusher cluster (required for Pusher, empty for self-hosted)
    wsHost: '127.0.0.1',      // WebSocket host
    wsPort: 6001,             // WebSocket port (non-TLS)
    wssPort: 443,             // WebSocket port (TLS)
    forceTLS: true,           // Force TLS connection
    activityTimeout: 120000,  // Milliseconds before sending ping
    pongTimeout: 30000,       // Milliseconds to wait for pong
    channelAuthorization: [   // For private/presence channels
        'transport' => 'http',
        'endpoint' => 'https://your-app.com/broadcasting/auth',
        'headers' => [
            'Authorization' => 'Bearer your-token',
        ],
    ],
);

Channel Authorization

Private and presence channels require authorization. The http transport makes a POST request to your auth endpoint:

$pusher = new Pusher('app-key', new Options(
    wsHost: '127.0.0.1',
    wsPort: 8080,
    channelAuthorization: [
        'transport' => 'http',
        'endpoint' => 'https://your-app.com/broadcasting/auth',
        'headers' => [
            'Authorization' => 'Bearer ' . $token,
            'Accept' => 'application/json',
        ],
    ],
));

// Now private channels will authenticate automatically
$channel = $pusher->subscribe('private-user-123');

For custom authorization logic, use a customHandler:

channelAuthorization: [
    'customHandler' => function ($params, $callback) {
        // $params->socketId - the socket ID
        // $params->channelName - the channel being authorized

        // Make your own auth request...
        $authData = myCustomAuth($params);

        // Call back with result
        $callback(null, new ChannelAuthorizationData(auth: $authData['auth']));
    },
],

Development

Prerequisites

You'll need a Pusher-compatible WebSocket server running locally for integration tests. Options include:

Soketi (recommended for development):

# Via npm (requires Node.js 14-18)
npx soketi start

# Via Docker
docker run -p 6001:6001 quay.io/soketi/soketi:1.6-16-debian

Laravel Reverb (if using Laravel Herd):

php artisan reverb:start

Environment Setup

Copy the example environment file and configure your server:

cp .env.example .env

Edit .env with your server details:

PUSHER_HOST=127.0.0.1
PUSHER_PORT=6001
PUSHER_SCHEME=ws

PUSHER_APP_ID=app-id
PUSHER_APP_KEY=app-key
PUSHER_APP_SECRET=app-secret
PUSHER_CLUSTER=mt1

Running Tests

# Unit and feature tests (no server required)
composer test

# Integration tests (requires running server)
composer test:integration

# All tests
composer test:all

# With coverage
composer test:coverage

# Type coverage
composer test:types

Code Quality

# Linting
composer lint

# Static analysis
composer stan

Architecture

This package is built on ReactPHP for asynchronous I/O:

• ratchet/pawl - WebSocket client
• react/event-loop - Event loop
• react/promise - Promises/async

The codebase follows the structure of pusher-js, ported to idiomatic PHP with full type coverage.

Contributing

Contributions are welcome! Please ensure:

1. Tests pass: composer test
2. Code style is correct: composer lint
3. Static analysis passes: composer stan
4. Type coverage remains at 100%: composer test:types

Security Vulnerabilities

Please report security vulnerabilities to security@artisan.build.

Credits

• Len Woodward
• Ed Grosvenor
• All Contributors

This package is a PHP port of pusher-js by Pusher.

License

The MIT License (MIT). Please see License File for more information.