PHP开发实时聊天功能的即时通信协议与技术选择

<?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, $msg) {
        foreach ($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();

<?php
header('Content-Type: text/event-stream');
header('Cache-Control: no-cache');

while (true) {
    // 查询数据库或其他逻辑
    $data = fetchData();

    if ($data) {
        echo "data: " . json_encode($data) . "

";
        flush();
        break;
    }

    sleep(1); // 模拟等待新消息
}

<?php
require 'vendor/autoload.php';

use MonologLogger;
use MonologHandlerStreamHandler;
use XMPPHPXMPP;

$log = new Logger('xmpp');
$log->pushHandler(new StreamHandler('xmpp.log', Logger::DEBUG));

$conn = new XMPP('example.com', 5222, 'username', 'password', 'xmpphp', 'example.com', false, XMPPHP_Log::LEVEL_VERBOSE, $log);

$conn->connect();
$conn->processUntil('session_start');
$conn->presence();

while (true) {
    $payloads = $conn->processUntil(array('message', 'presence', 'end_stream', 'session_start'));

    foreach ($payloads as $event) {
        $from = $event['from'];
        $message = $event['stanza']->body;

        // 处理接收到的消息
        handleMessage($from, $message);
    }
}

$conn->disconnect();