Workerman open source library analysis: quickly build high-performance network applications

In the current Internet era, the demand for network applications continues to grow. For developers, building high-performance, reliable network applications is an important task Essential skills. As an open source PHP network application framework, Workerman provides a solution for quickly building high-performance network applications.

1. What is Workerman?

Workerman is a high-performance asynchronous network application framework developed based on PHP, which can be used to quickly build Websocket, TCP, UDP and other network applications. It adopts an asynchronous non-blocking I/O model and supports thousands of connections simultaneously in the same process. Compared with the traditional multi-process model based on Apache or Nginx, Workerman is more efficient in I/O operations.

2. Installation and simple example

Before we begin, we first need to install Workerman. Installation through Composer is the easiest way, just run the following command:

composer require workerman/workerman

After the installation is complete, we can start writing a simple Workerman example. The following is a simple PHP file named server.php:

<?php
require_once __DIR__ . '/vendor/autoload.php';

use WorkermanWorker;

$worker = new Worker('websocket://0.0.0.0:8000');

$worker->count = 4;

$worker->onMessage = function($connection, $data) {
    $connection->send('Hello, ' . $data . '!');
};

Worker::runAll();

In the above example, we created a Worker object and specified the listening protocol and address. At the same time, we also set the number of Worker processes to 4.

Next, we define a callback function onMessage, which will be called when a client sends a message. In this simple example, we process the received message and return a reply message to the client using the send method.

Finally, we call the Worker::runAll() method to start the Worker service. Now, we can execute the following command to start this service:

php server.php start

In this way, the Workerman server is started successfully. You can connect to ws://localhost:8000 through a browser or other tools, then enter some content, and you will receive a message returned by the server.

3. Working Principle

The working principle of Workerman is based on a process model composed of a main process and multiple sub-processes. The main process is responsible for listening to the port and distributing requests, and the sub-process is responsible for specific business logic processing.

When a new connection request arrives, the main process will send it to the idle child process for processing after receiving the request. After receiving the request, the child process will communicate with the corresponding connection and process the corresponding business. This process model can support thousands of concurrent connections.

4. More functions and scalability

In addition to basic network communication functions, Workerman also provides many other features and scalability to make development simpler and more efficient.

1. Support WebSocket protocol: Workerman has built-in support for the WebSocket protocol, making it easy to build real-time push, online chat and other applications.
2. Support TCP and UDP protocols: In addition to WebSocket, Workerman also supports traditional TCP and UDP protocols, which can handle various network communication needs.
3. Support long connections: Workerman can implement long connections, greatly reducing the cost of each connection and improving the performance of network applications.
4. Support custom protocols: Workerman supports custom network protocols and can adapt to different application scenarios.
5. Support asynchronous MySQL, Redis, etc.: Workerman also provides asynchronous MySQL, Redis and other database operation libraries to facilitate asynchronous processing of database operations.

Through these rich functions and scalability, Workerman can provide better support in building various network applications.

Summary:

In this article, we analyzed the Workerman open source library and provided a simple example. As a powerful and efficient network application framework, Workerman can help developers quickly build high-performance network applications. By learning and using Workerman, you can more easily cope with various network application development needs.

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