How to use PHP functions to build distributed systems?

PHP builds distributed systems through distributed functions, including: Installing igbinary and inotify extensions. Write distributed functions and serialize data using IGBinary\UBJSON. Use Inotify to register functions into the distributed system. Image processing practical case: create the image_process distributed function and register it in the system using igbinary and inotify, upload the image from the web application, and the system calls the function to process and store it.

How to build a distributed system in PHP

A distributed system is a system that connects multiple independent computers together to work together. A system for working and achieving common goals. PHP makes it easy to build distributed systems by using distributed functions.

Distributed function

A distributed function is a function that can be executed simultaneously on multiple nodes in a distributed system. Distributed functions in PHP are implemented using the igbinary and inotify extensions.

Install the extension

First, you need to install the igbinary and inotify extensions:

pecl install igbinary
pecl install inotify

Write a distributed function

Next, write a distributed function:

use IGBinary\UBJSON as Serializer;

function my_distributed_function(array $data): array
{
    // 函数逻辑
}

Make sure to use the Serializer class in the function to serialize and decode the data. Serialization.

Register the function in the distributed system

Now, you need to register the function in the distributed system:

$igbinary = new IGBinary\IGBinary();
$serializer = new Serializer($igbinary);

$registry = new Inotify\Inotify();
$registry->watch('/tmp/registry');

// 等待函数调用
while (true) {
    $events = $registry->poll();
    if ($events) {
        // 处理函数调用
    }
}

Practical case

Asynchronous Image Processing

Use distributed functions to build an image processing system that can batch-process images into different sizes.

Steps:

1. Create image_process distributed function to process images.
2. Use igbinary and inotify to register the image_process function into the distributed system.
3. Upload images from a web application into a distributed system.
4. The distributed system will call the image_process function to process the image.
5. The processed images will be stored in the distributed system.

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