Analysis of the Workerman open framework principle: exploring the secrets of its high performance

Workerman open framework principle analysis: exploring the secret of its high performance

Introduction:
In today's Internet era, for developers, building high performance Web application is an important task. The Workerman open framework is a solution that provides developers with high-performance network communication. This article will analyze the principles of the Workerman framework in detail and explore the secrets of its high performance.

1. Introduction to Workerman Framework
Workerman is a high-performance PHP open framework. It uses native PHP Socket extensions to enable PHP to support multi-process, multi-thread, asynchronous and other features. The Workerman framework has the following characteristics:

1. Fast and high performance: Workerman uses non-blocking I/O operations and handles client requests through an event polling mechanism to achieve high-performance network communication.
2. Multi-process, multi-thread: The Workerman framework supports multi-process mode and multi-thread mode, which can make full use of the multi-core processor resources of the machine and improve the concurrent processing capability of the program.
3. Asynchronous programming: Workerman adopts an asynchronous programming mode to hand over I/O operations to the operating system kernel for processing, reducing CPU idle time and improving the program's concurrent processing capabilities.

2. The main principles of the Workerman framework

1. Socket communication: The Workerman framework is based on the native PHP Socket extension and uses the TCP/IP protocol for network communication. By creating a listening Socket, receive the client's connection request and manage the establishment and closing of the connection.
2. Multi-process/multi-thread mode: The Workerman framework supports both multi-process and multi-thread modes. In multi-process mode, the Worker process adopts the Master-Worker mode. The Master process listens to the Socket and receives client requests, and then distributes the requests to the Worker process for processing. In multi-threaded mode, each Worker thread independently listens to the Socket and processes client requests.
3. Event polling: The Workerman framework uses an event polling mechanism to process client requests through non-blocking I/O operations and event-driven methods. When a new client connection request arrives, the corresponding processing logic is triggered through event callbacks. For the established connection, the Workerman framework maintains an event loop, constantly detecting whether new data has arrived in the Socket, and if so, triggering the corresponding event callback.
4. Asynchronous programming: The Workerman framework adopts an asynchronous programming model and implements asynchronous calls by using PHP features such as the yield keyword and Generator. Asynchronous programming can avoid the CPU being idle while waiting for I/O operations to complete, improving the concurrent processing capabilities of the program.

3. Workerman Framework Sample Code
The following is a sample code that uses the Workerman Framework to create a simple chat room:

use WorkermanWorker;

require_once DIR . '/vendor/autoload.php';

// Create a Worker to listen to port 8090 and use the websocket protocol for communication
$worker = new Worker('websocket://0.0.0.0:8090');

// Start 4 processes to process client requests
$worker->count = 4;

// The callback function triggered when the client connection is established
$worker->onConnect = function ($connection) {

echo "New connection

";
};

// Callback function triggered when the client disconnects
$worker->onClose = function ($connection) {

echo "Connection closed

";
};

// Callback function triggered when a message sent by the client arrives
$worker->onMessage = function ($connection, $message) {

// 广播消息给所有连接的客户端
foreach ($worker->connections as $client) {
    $client->send($message);
}

};

// Run worker
Worker::runAll();

Through the above sample code, we can see that the process of creating a chat room using the Workerman framework is very simple and convenient. The Worker class provides a rich set of callback functions that can handle different events, making it easier to develop network applications.

Conclusion:
The Workerman framework is an excellent open framework with features such as high performance, multi-process/multi-thread mode, and asynchronous programming. Its principle is based on the native PHP Socket extension, using event polling mechanism and asynchronous programming mode to achieve high-performance network communication. Through the principle analysis and sample code of this article, I hope readers can have a deeper understanding of the Workerman framework and be able to flexibly apply it in development practice.

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