PHP WebSocket開発例：具体的な機能の実装例

composer require cboden/ratchet

<?php

require 'vendor/autoload.php';

use RatchetMessageComponentInterface;
use RatchetConnectionInterface;
use RatchetServerIoServer;
use RatchetHttpHttpServer;
use RatchetWebSocketWsServer;

class Chat implements MessageComponentInterface {
    protected $clients;
    
    public function __construct() {
        $this->clients = new SplObjectStorage;
    }
    
    public function onOpen(ConnectionInterface $conn) {
        $this->clients->attach($conn);
        echo "New connection! ({$conn->resourceId})
";
    }
    
    public function onMessage(ConnectionInterface $from, $msg) {
        // 处理消息，比如将消息发送给其他在线用户
        foreach ($this->clients as $client) {
            if ($client !== $from) {
                $client->send($msg);
            }
        }
    }
    
    public function onClose(ConnectionInterface $conn) {
        $this->clients->detach($conn);
        echo "Connection {$conn->resourceId} has disconnected
";
    }
    
    public function onError(ConnectionInterface $conn, Exception $e) {
        echo "An error has occurred: {$e->getMessage()}
";
        $conn->close();
    }
}

$server = IoServer::factory(
    new HttpServer(
        new WsServer(
            new Chat()
        )
    ),
    8080
);

$server->run();

<script>
var conn = new WebSocket('ws://localhost:8080');

conn.onopen = function() {
    console.log('Connected!');
}

conn.onmessage = function(e) {
    console.log('Received: ' + e.data);
}

function sendMessage() {
    var message = document.getElementById('input').value;
    conn.send(message);
}
</script>

public function onOpen(ConnectionInterface $conn) {
    $this->clients->attach($conn);
    echo "New connection! ({$conn->resourceId})
";
    
    // 将新用户加入用户列表，并广播给其他在线用户
    foreach ($this->clients as $client) {
        $client->send('New user has joined');
    }
}

public function onClose(ConnectionInterface $conn) {
    $this->clients->detach($conn);
    echo "Connection {$conn->resourceId} has disconnected
";
    
    // 将离线用户从用户列表中删除，并广播给其他在线用户
    foreach ($this->clients as $client) {
        $client->send('A user has left');
    }
}