Common business scenarios and solutions for real-time chat systems based on PHP

// PHP WebSocket Server
class WebSocketServer
{
    public function __construct($host, $port)
    {
        // 创建WebSocket服务器
        $this->server = new SwooleWebSocketServer($host, $port);
        
        // 监听WebSocket连接事件
        $this->server->on('open', function (SwooleWebSocketServer $server, SwooleHttpRequest $request) {
            // 连接建立时的逻辑处理
            echo "WebSocket连接建立成功
";
        });
        
        // 监听WebSocket消息事件
        $this->server->on('message', function (SwooleWebSocketServer $server, SwooleWebSocketFrame $frame) {
            // 处理接收到的消息
            echo "收到消息：{$frame->data}
";
            
            // 回复消息给客户端
            $server->push($frame->fd, 'Server: ' . $frame->data);
        });
        
        // 开启WebSocket服务器
        $this->server->start();
    }
}

// 在线客服业务逻辑
class OnlineCustomerService
{
    public function __construct($host, $port)
    {
        $this->server = new WebSocketServer($host, $port);
    }
    
    // 消息推送
    public function pushMessage($message, $fd = null)
    {
        if ($fd) {
            // 推送消息给指定客户端
            $this->server->push($fd, 'Server: ' . $message);
        } else {
            // 推送消息给所有客户端
            foreach ($this->server->connections as $fd) {
                $this->server->push($fd, 'Server: ' . $message);
            }
        }
    }
}

// 使用示例
$customerService = new OnlineCustomerService('127.0.0.1', 9501);
$customerService->pushMessage('欢迎使用在线客服');

// PHP长轮询服务器
class LongPollingServer
{
    public function __construct($host, $port)
    {
        // 创建HTTP服务器
        $this->server = new SwooleHttpServer($host, $port);
        
        // 监听HTTP请求事件
        $this->server->on('request', function (SwooleHttpRequest $request, SwooleHttpResponse $response) {
            // 处理客户端请求，并返回响应
            $response->header('Content-Type', 'text/plain');
            $response->end('Hello World!');
        });
        
        // 开启HTTP服务器
        $this->server->start();
    }
}

// 在线客服业务逻辑
class OnlineCustomerService
{
    public function __construct($host, $port)
    {
        $this->server = new LongPollingServer($host, $port);
    }
    
    // 消息推送
    public function pushMessage($message)
    {
        // 向所有客户端推送消息，消息将在客户端接收到响应后返回
        $pushUrl = 'http://localhost:' . $this->server->port;
        file_get_contents($pushUrl, false, stream_context_create([
            'http' => [
                'method' => 'POST',
                'header' => 'Content-Type: application/x-www-form-urlencoded',
                'content' => http_build_query(['message' => $message])
            ]
        ]));
    }
}

// 使用示例
$customerService = new OnlineCustomerService('127.0.0.1', 9501);
$customerService->pushMessage('欢迎使用在线客服');

// WebRTC服务器
class WebRTCServer
{
    public function __construct($host, $port)
    {
        // 创建WebSocket服务器
        $this->server = new SwooleWebSocketServer($host, $port);
        
        // 监听WebSocket连接事件
        $this->server->on('open', function (SwooleWebSocketServer $server, SwooleHttpRequest $request) {
            // 连接建立时的逻辑处理
            echo "WebSocket连接建立成功
";
        });
        
        // 监听WebSocket消息事件
        $this->server->on('message', function (SwooleWebSocketServer $server, SwooleWebSocketFrame $frame) {
            // 处理接收到的消息
            echo "收到消息：{$frame->data}
";
            
            // 广播消息给所有客户端
            foreach ($server->connections as $fd) {
                $server->push($fd, 'Server: ' . $frame->data);
            }
        });
        
        // 监听WebSocket关闭事件
        $this->server->on('close', function (SwooleWebSocketServer $server, $fd) {
            // 连接关闭时的逻辑处理
            echo "WebSocket连接已关闭
";
        });
        
        // 开启WebSocket服务器
        $this->server->start();
    }
}

// 使用示例
$webrtcServer = new WebRTCServer('127.0.0.1', 9501);