《PHP WebSocket实时应用：从聊天室到股票行情》

《PHP WebSocket实时应用：从聊天室到股票行情》

摘要：WebSocket实现低延迟通信。本文通过案例演示Ratchet库的聊天室实现、心跳检测和消息广播。

代码示例：

php

// Ratchet WebSocket服务器

require 'vendor/autoload.php';

use Ratchet\MessageComponentInterface;

use Ratchet\ConnectionInterface;

class Chat implements MessageComponentInterface {

protected $clients;

public function __construct

$this->clients = new \SplObjectStorage;

public function onOpen(ConnectionInterface $conn) {

$this->clients->attach($conn);

echo "新连接: {$conn->resourceId}\n";

public function onMessage(ConnectionInterface $from, $msg) {

foreach ($this->clients as $client) {

if ($from !== $client) {

$client->send($msg);

$app = new Ratchet\App('localhost', 8080);

$app->route('/chat', new Chat);

$app->run();

扩展讨论：

协议选择（WebSocket vs SSE）

负载均衡与集群部署