PHP实时通信功能在在线教育平台中的应用剖析

// 服务端代码
use RatchetServerIoServer;
use RatchetHttpHttpServer;
use RatchetWebSocketWsServer;
use MyAppChat;

require dirname(__DIR__) . '/vendor/autoload.php';

$server = IoServer::factory(
    new HttpServer(
        new WsServer(
            new Chat()
        )
    ),
    8080
);
$server->run();

// 客户端代码
var conn = new WebSocket('ws://localhost:8080');
conn.onopen = function(e) {
    console.log("Connection established!");
};
conn.onmessage = function(e) {
    console.log("Received: " + e.data);
};

function longPolling() {
    $.ajax({
        url: 'long_polling.php',
        type: 'GET',
        dataType: 'json',
        success: function(data) {
            console.log("Received: " + data.message);
            longPolling();
        },
        error: function(xhr, status, error) {
            console.log("Error: " + error);
            longPolling();
        }
    });
}

longPolling();

// long_polling.php
$response = array(
    'message' => 'Hello, World!'
);

echo json_encode($response);

// 接收学生的提问
$app->post('/questions', function(Request $request, Response $response) {
    $data = $request->getParsedBody();

    // 处理问题并将回答发送给学生
});

// 学生发送提问
$.ajax({
    url: 'questions',
    type: 'POST',
    data: {
        question: 'How do I solve this problem?'
    },
    success: function(data) {
        console.log("Question submitted!");
    },
    error: function(xhr, status, error) {
        console.log("Error: " + error);
    }
});

// 发送问题给学生
$app->post('/classroom/questions', function(Request $request, Response $response) {
    $data = $request->getParsedBody();

    // 将问题广播给学生
});

// 学生接收问题并作答
conn.onmessage = function(e) {
    var question = e.data;

    // 显示问题，并提交答案
};