README

AMPHP is a collection of event-driven libraries for PHP designed with fibers and concurrency in mind. amphp/parallel-functions provides a utility function which wraps a callable into another callable which will execute on another process or thread. All data within the callable object or closure must be serializable.

See the Worker and Task interfaces in amphp/parallel for a more flexible and customizable API for running tasks in parallel.

Installation

This package can be installed as a Composer dependency.

composer require amphp/parallel-functions

Requirements

• PHP 8.1+

Example

<?php

use function Amp\ParallelFunctions\parallelMap;

$responses = parallelMap([
    'https://google.com/',
    'https://github.com/',
    'https://stackoverflow.com/',
], function ($url) {
    return file_get_contents($url);
});

Note that file_get_contents() is being used here as an example blocking function (that is, a function which halts the process while awaiting I/O).

We recommend performing HTTP requests using amphp/http-client.

The best functions to parallelize are those which perform many CPU-intensive calcuations or blocking functions which would be difficult or time-consuming to implement in a non-blocking way.

Further examples can be found in the ./examples directory.

Versioning

amphp/parallel-functions follows the semver semantic versioning specification like all other amphp packages.

Security

If you discover any security related issues, please use the private security issue reporter instead of using the public issue tracker.

License

The MIT License (MIT). Please see LICENSE for more information.