How to implement image processing in Workerman documents

How to implement image processing in Workerman documents requires specific code examples

Workerman is a high-performance asynchronous event-driven network server framework based on PHP. It can Real-time communication and high concurrency processing are achieved. In Workerman's official documentation, there is a chapter on how to process images. This article will combine specific code examples to introduce how to implement image processing in Workerman.

First, we need to install Workerman, which can be installed through Composer. Create a composer.json file in the project directory and add the following content in the file:

{
    "require": {
        "workerman/workerman": "3.*"
    }
}

Then execute the following command to install:

composer install

Next, we will create a Workerman server, Used to receive images uploaded by clients and process them. The following is a simple sample code:

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

use WorkermanWorker;

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

$worker->onMessage = function ($connection, $data) {
    // 接收到客户端上传的图片
    $imageData = $data;

    // 对图片进行处理，这里可以根据具体需求进行处理
    // 例如，可以将图片进行缩放、裁剪、加水印等操作
    $processedImage = processImage($imageData);

    // 将处理后的图片返回给客户端
    $connection->send($processedImage);
};

Worker::runAll();

function processImage($imageData)
{
    // 这里是处理图片的代码逻辑
    // 返回处理后的图片数据
}
?>

In the above code, we create a Workerman server and bind it on port 8000. When the message sent by the client is received, that is, when the picture data is received, the onMessage callback function will be called for processing. In the callback function, we can process the received images, such as scaling, cropping, watermarking, etc. Finally, the processed image data is returned to the client.

After we complete the server-side code, we need to write a client program to send pictures to the server. Here is a simple sample code:

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

use WorkermanConnectionAsyncTcpConnection;

$imageData = file_get_contents('path_to_image.jpg');

$connection = new AsyncTcpConnection('tcp://127.0.0.1:8000');

$connection->onConnect = function ($connection) use ($imageData) {
    // 连接成功后发送图片数据给服务器
    $connection->send($imageData);
};

$connection->onMessage = function ($connection, $imageData) {
    // 服务器返回处理后的图片数据
    // 这里可以保存图片或进行其他操作
};

$connection->connect();

Worker::runAll();
?>

In the above code, we read an image and send it to the server. After processing by the server, the processed image data will be returned to the client. We can save the returned image data or perform other operations in the onMessage callback function.

Through the above code examples, we can implement the image processing function in Workerman. Through customized processing logic, we can perform various operations on images to meet specific needs. At the same time, Workerman's high performance and asynchronous event-driven features can also ensure the efficiency and concurrency performance of image processing.

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