php无数据库聊天室

// 示例代码：使用Ratchet库创建WebSocket服务器
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);
    }

    public function onMessage(ConnectionInterface $from, $msg) {
        foreach ($this->clients as $client) {
            if ($from !== $client) {
                $client->send($msg);
            }
        }
    }

    public function onClose(ConnectionInterface $conn) {
        $this->clients->detach($conn);
    }

    public function onError(ConnectionInterface $conn, \Exception $e) {
        $conn->close();
    }
}

// 示例代码：优化长轮询逻辑
<?php
header('Content-Type: application/json');

$messages = []; // 假设这是一个存储消息的数组

if (isset($_GET['last_id'])) {
    $last_id = intval($_GET['last_id']);
    $new_messages = array_filter($messages, function($msg) use ($last_id) {
        return $msg['id'] > $last_id;
    });

    if (!empty($new_messages)) {
        echo json_encode($new_messages);
    } else {
        sleep(1); // 如果没有新消息，等待1秒再响应
        echo json_encode([]);
    }
} else {
    echo json_encode([]);
}
?>