Detailed explanation of Workerman open source library: Sharing examples of quickly building high-concurrency server applications-Workerman-php.cn

Detailed explanation of Workerman open source library: Sharing examples of quickly building high-concurrency server applications

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Release： 2023-08-05 16:37:03

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Detailed explanation of Workerman open source library: Sharing examples of quickly building high-concurrency server applications

Introduction:
In the IT field, with the rapid development of the Internet, the demand for high-concurrency server applications is increasing. In order to meet this demand, developers seek various methods and tools to build efficient and scalable server applications. As a PHP open source library, Workerman provides a solution for quickly building high-concurrency server applications. This article will introduce the features and uses of Workerman in detail, and demonstrate its powerful functions through example sharing.

1. Introduction to Workerman
Workerman is a PHP framework developed and open sourced by Chinese developer Huang Yanhua. It aims to provide a simple, flexible, efficient and stable development solution. Its main features are as follows:

High performance: Workerman is based on PHP's event-driven programming model, and the kernel is implemented using the epoll edge trigger mode, which greatly improves the server's ability to handle concurrent requests. Compared with the traditional synchronous blocking IO model, Workerman's performance has been significantly improved.
Multi-protocol support: Workerman supports HTTP, WebSocket and custom protocols. This means that whether you are developing a Web server or a real-time communication application, you can be satisfied.
Good scalability: Workerman provides rich extension interfaces and plug-in mechanisms. Developers can carry out customized development according to actual needs, and can be easily integrated with other frameworks (such as Laravel, Symfony, etc.).

2. Workerman usage example
In order to demonstrate the advantages and usage of Workerman more intuitively, below we will use a simple example to demonstrate how to use Workerman to build a chat room application based on WebSocket.

Install Workerman
First, we need to install Workerman through Composer. Open a command line terminal and execute the following command:

composer require workerman/workerman

Create server application
Create a file named chat.php and add it in Write the following code:

<?php

require __DIR__ . '/vendor/autoload.php';

use WorkermanWorker;

// 创建一个Worker监听8080端口，使用WebSocket协议通信
$ws_worker = new Worker("websocket://0.0.0.0:8080");

// 启动多个进程，以利用多核CPU
$ws_worker->count = 4;

// 响应浏览器请求时触发的回调函数
$ws_worker->onMessage = function ($connection, $data) {
    // 向所有客户端广播消息
    foreach ($ws_worker->connections as $client) {
        $client->send($data);
    }
};

// 运行Worker
Worker::runAll();

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The above code creates a WebSocket Worker object and listens to port 8080. $ws_worker->onMessageThe callback function is used to process the message sent by the browser and send the message back by traversing all client connections, thereby broadcasting the message to all connected clients.

Start the server application
In the command line terminal, switch to the directory where chat.php is located, and execute the following command to start the server application:

php chat. php start

Write HTML page
Create a file named index.html and write the following code in it:

<!DOCTYPE html>
<html>
<head>
    <title>Workerman聊天室</title>
    <style>
        #messages {
            height: 200px;
            overflow-y: scroll;
        }
    </style>
    <script>
        var ws = new WebSocket('ws://localhost:8080');

        ws.onopen = function () {
            console.log('连接成功！');
        };

        ws.onmessage = function (event) {
            var messages = document.getElementById('messages');
            messages.innerHTML += '<br>' + event.data;
            messages.scrollTop = messages.scrollHeight;
        };

        function sendMsg() {
            var input = document.getElementById('message');
            var msg = input.value;
            input.value = '';

            ws.send(msg);
        }
    </script>
</head>
<body>
    <div id="messages"></div>
    <input type="text" id="message" placeholder="请输入消息">
    <button onclick="sendMsg()">发送</button>
</body>
</html>

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The above code creates a WebSocket connection and send the message to the server by entering the message on the page and clicking the send button. The server broadcasts the message to all connected clients, and the clients display the message on the page after receiving it.

Run the application
Place the index.html file in the root directory of the web server and access http://localhost/index.html in the browser. You can experience the chat room application built based on Workerman.

Conclusion:
This article introduces the characteristics and usage of the Workerman open source library, and demonstrates through an example how to use Workerman to build a chat room application based on WebSocket. Workerman has become one of developers' favorite tools due to its high performance, multi-protocol support and good scalability. Let us forge ahead and jointly explore more possibilities for high-concurrency server applications.

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