Home > Article > Backend Development > Use php to develop Websocket to create real-time data statistics function

Use php to develop Websocket to create real-time data statistics function

王林Original: 2023-12-02 09:07:101265browse

Use PHP to develop Websocket to create real-time data statistics function

Introduction:
Websocket is a full-duplex communication protocol that can communicate between the browser and the server Establish a persistent connection between them to achieve real-time communication. In Web development, Websocket is often used to implement real-time data transmission, such as real-time chat, real-time monitoring, real-time data statistics and other functions. This article will introduce how to use PHP to develop Websocket and provide specific code examples to implement real-time data statistics functions.

1. Understand Websocket
Websocket is a communication protocol based on TCP protocol, which supports two-way communication. Websocket uses ws:// (or wss://) as the URL prefix instead of the common http:// (or https://). Unlike HTTP requests, Websocket communication maintains a continuous connection rather than a request-response mode. When the connection is established, the server and client can send messages to each other at any time.

2. Build a Websocket server
In PHP, we can use the Swoole extension to build a Websocket server. Swoole is a coroutine network communication engine that provides a series of APIs to facilitate developers to use PHP language for high-performance network programming.

1. Install the Swoole extension
We can install the Swoole extension through the following command:

$ pecl install swoole

2. Write a Websocket server

<?php
$server = new swoole_websocket_server("0.0.0.0", 9501);

// 监听WebSocket连接打开事件
$server->on('open', function (swoole_websocket_server $server, $request) {
    echo "New connection: {$request->fd}
";
});

// 监听WebSocket消息事件
$server->on('message', function (swoole_websocket_server $server, $frame) {
    // 在这里处理接收到的消息
    echo "Received message: {$frame->data}
";
});

// 监听WebSocket连接关闭事件
$server->on('close', function ($ser, $fd) {
    echo "Connection closed: {$fd}
";
});

// 启动WebSocket服务器
$server->start();
?>

3. Send real-time data
In the message event of the Websocket server, we can process the received message and send data to the client based on business logic. In the real-time data statistics function, the latest data is usually sent to the client regularly.

1. Get real-time data
We can write code at the appropriate location to get the latest real-time data from the database or other sources.

2. Send data regularly

function sendMessageToAllClients($server, $message) {
    foreach ($server->connections as $fd) {
        $server->push($fd, $message);
    }
}

function sendRealtimeData($server) {
    // 获取实时数据
    $data = getDataFromDatabase();

    // 将数据转换成JSON格式
    $json = json_encode($data);

    // 发送数据给所有客户端
    sendMessageToAllClients($server, $json);
}

// 设置定时任务，每隔5秒发送最新的实时数据给所有客户端
swoole_timer_tick(5000, function ($timerId) use ($server) {
    sendRealtimeData($server);
});

4. Front-end page
Finally, we need to write a front-end page to display real-time data.

<!DOCTYPE html>
<html>
<head>
    <title>实时数据统计</title>
</head>
<body>
    <h1>实时数据统计</h1>
    <div id="realtime-data"></div>

    <script>
        var ws = new WebSocket("ws://your-websocket-server-address");
        
        ws.onmessage = function(event) {
            var data = JSON.parse(event.data);
            // 在这里处理接收到的实时数据
            document.getElementById("realtime-data").innerText = JSON.stringify(data);
        };
    </script>
</body>
</html>

Conclusion:
By developing Websocket server with PHP, we can easily implement real-time data statistics function. This article gives specific implementation steps and code examples, hoping to be helpful to developers. Using Websocket technology, we can implement more real-time functions, such as real-time chat, real-time monitoring, etc. With the widespread application of Websocket technology, we can provide users with a better interactive experience and real-time data display.

The above is the detailed content of Use php to develop Websocket to create real-time data statistics function. For more information, please follow other related articles on the PHP Chinese website!

php swoole 事件数据库 http https websocket

Statement：

The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Previous article：PHP syntax error? You must know these common mistakes!Next article：PHP syntax error? You must know these common mistakes!

See more

Use php to develop Websocket to create real-time data statistics function

Related articles