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InitPHP Socket — Wiki

Welcome to the official documentation for initphp/socket — a lightweight TCP, UDP, TLS and SSL socket server / client toolkit for PHP 8.1+.

composer require initphp/socket

use InitPHP\Socket\Socket;
use InitPHP\Socket\Enum\Transport;

$server = Socket::server(Transport::TCP, '127.0.0.1', 8080);
$server->listen();
$server->live(function ($srv, $conn) {
    $payload = $conn->read(1024);
    if ($payload !== null) {
        $conn->write("echo: {$payload}");
    }
});

The package gives you four building blocks every long-running PHP service ends up writing by hand:

Layer	Class / Concept	Purpose
Factory	Socket::server() / Socket::client()	One entry point dispatching by Transport enum
Servers	Server\{TCP, UDP, TLS, SSL}	Bind, listen and dispatch with a select-driven loop
Clients	Client\{TCP, UDP, TLS, SSL}	Connect-read-write to a remote endpoint
Channels	Channel\{Tcp, Udp, Stream}Channel	Per-transport I/O strategy used by ServerConnection

Start here

• Installation — composer, requirements, optional extensions.
• Quick Start — bind, accept, echo in under 20 lines.
• Architecture — how the factory, channels, loop and connections fit together.

Transports

• Transport TCP — stream-oriented sockets, ext-sockets backend.
• Transport UDP — datagram sockets with per-peer routing.
• Transport TLS — tls:// streams, modern handshake.
• Transport SSL — ssl:// streams, legacy fallback.

API

• Server Lifecycle · Client Lifecycle — what each method does and when.
• Connection and Channel — the per-accepted-client object and its strategy.
• Event Loop Integration — embedding the server in your own loop with tick().
• API Reference — single-page method matrix.
• Enums · Exceptions · SSL Context Options

Recipes

• Recipe Echo Server — minimal TCP / UDP echo.
• Recipe Chat Server — registered clients + targeted broadcast.
• Recipe SMTP Client — raw EHLO over implicit TLS.
• Recipe Broadcast — fan-out to all / by-id / by-list.
• Recipe Self Signed TLS — generate a cert, bind a TLS server, connect from a client.
• Recipe Custom Channel — write your own transport strategy.

Operational

• Testing Strategy — unit + integration patterns we use ourselves.
• Migration Guide — moving from 1.x to 2.x.
• FAQ — common questions and gotchas.

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2.x line · PHP 8.1+ · MIT · GitHub · Packagist