Building a real-time stock trading system based on Workerman

Building a real-time stock trading system based on Workerman

Introduction:
With the rapid development of Internet technology, more and more people are participating in stock trading. In traditional stock trading systems, real-time and stability are one of the most important requirements. In order to meet these needs, we can use PHP's network programming framework Workerman to build an efficient, real-time stock trading system.

1. Introduction
Workerman is a high-performance asynchronous multi-process network programming framework based on PHP. It provides extremely high concurrent connection capabilities and stability through multi-process and asynchronous IO. When building a real-time stock trading system, we can use Workerman to handle client requests and push stock quotes.

2. System requirements

1. Building environment: Linux operating system, PHP environment
2. Quote data source: real-time stock quotation data interface or simulated data source
3. Front-end page: HTML, CSS, JavaScript, etc.

3. System design

1. Server side
   On the server side, we need to obtain stock market data in real time and pushed to the client. We can use Workerman's asynchronous IO feature to call the market data interface and push the obtained data to the client through the WebSocket protocol.

// 引入Workerman的Autoloader
require_once __DIR__ . '/Workerman/Autoloader.php';
use WorkermanWorker;

// 创建一个WebSocket协议的Worker对象
$ws_worker = new Worker('websocket://0.0.0.0:8000');

// 进程数设置为CPU核心数的2倍
$ws_worker->count = 2 * swoole_cpu_num();

// 当客户端连接时触发的回调函数
$ws_worker->onConnect = function($connection) {
    echo "新的连接
";
};

// 当客户端发送消息时触发的回调函数
$ws_worker->onMessage = function($connection, $data) {
    echo "收到消息: $data
";
};

// 当客户端断开连接时触发的回调函数
$ws_worker->onClose = function($connection) {
    echo "连接断开
";
};

// 运行worker
Worker::runAll();

The above example code creates a Worker object of the WebSocket protocol and listens on port 8000. When a client connects, sends a message, or disconnects, the corresponding callback function is called respectively.

2. Client
   On the client side, we need to connect to the server through the WebSocket protocol to receive and display real-time stock quotes. We can use JavaScript's WebSocket API to communicate with the server.

// 创建WebSocket对象
var socket = new WebSocket("ws://localhost:8000");

// 当连接建立成功时触发的回调函数
socket.onopen = function(event) {
    console.log("连接成功");
};

// 当收到服务端推送的消息时触发的回调函数
socket.onmessage = function(event) {
    var data = JSON.parse(event.data);
    console.log("收到消息", data);
};

// 当连接关闭时触发的回调函数
socket.onclose = function(event) {
    console.log("连接关闭");
};

In the above sample code, we create a WebSocket object and handle connection and message events through callback functions such as onopen, onmessage, and onclose.

4. System Implementation

1. Get market data
   On the server side, we can use the CURL library or other methods to call the stock market data interface to obtain real-time market data. This is then organized into JSON format and pushed to the client via WebSocket.
2. Client page
   On the client side, we can use technologies such as HTML, CSS and JavaScript to build a simple page to display real-time stock quotation data and establish a WebSocket connection with the server.
3. Deployment and Debugging
   Deploy the server code to the server and start the service. Open the page on the client and open the console of the developer tools to view the real-time stock market data pushed by the server.

5. Summary
By using the Workerman framework, we can easily build an efficient, real-time stock trading system. In practical applications, we can further improve the system's functions, such as adding user authentication, transaction ordering and other functions. At the same time, we can also expand and optimize the system according to business needs to improve system performance and stability.

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