PHPで開発されたブログシステムのリアルタイム通知とリマインダー

// 服务端代码（使用Ratchet库）
require 'vendor/autoload.php';

use RatchetMessageComponentInterface;
use RatchetConnectionInterface;

class BlogNotification implements MessageComponentInterface
{
    protected $clients;

    public function __construct()
    {
        $this->clients = new SplObjectStorage;
    }

    public function onOpen(ConnectionInterface $conn)
    {
        $this->clients->attach($conn);
        echo "New client connected!
";
    }

    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 "Client disconnected
";
    }

    public function onError(ConnectionInterface $conn, Exception $e)
    {
        echo "An error has occurred: {$e->getMessage()}
";
        $conn->close();
    }
}

// 创建WebSocket服务器
$server = IoServer::factory(
    new HttpServer(
        new WsServer(
            new BlogNotification()
        )
    ),
    8080
);

$server->run();

// 客户端代码（使用WebSocket API）
var webSocket = new WebSocket('ws://localhost:8080');

webSocket.onmessage = function(event) {
    // 接收到服务器推送的消息后的处理逻辑
    var msg = JSON.parse(event.data);
    // 显示通知或更新页面中的内容等操作
};

webSocket.onopen = function(event) {
    console.log('Connection established');
};

webSocket.onerror = function(event) {
    console.log('An error has occurred');
};

// 向指定用户发送提醒
function sendNotification($user_id, $content)
{
    // 将提醒信息写入数据库
    $query = "INSERT INTO notifications (user_id, content) VALUES ('$user_id', '$content')";
    // 执行SQL语句...

    // 发送实时通知给用户（可选择使用上述WebSocket技术）
    // ...
}

// 获取用户的未读提醒数量
function getUnreadNotifications($user_id)
{
    $query = "SELECT COUNT(*) AS count FROM notifications WHERE user_id = '$user_id' AND is_read = 0";
    // 执行查询并获取结果...

    return $count;
}

// 标记提醒为已读
function markAsRead($user_id, $notification_id)
{
    $query = "UPDATE notifications SET is_read = 1 WHERE user_id = '$user_id' AND id = '$notification_id'";
    // 执行更新操作...
}