promises VS async

Compare promises vs async and see what are their differences.

promises

Promises/A+ library for PHP with synchronous support (by guzzle)

async

Async utilities and fibers for ReactPHP. (by reactphp)
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promises async
4 2
7,546 172
0.2% 0.6%
5.2 4.1
about 1 month ago 5 months ago
PHP PHP
MIT License MIT License
The number of mentions indicates the total number of mentions that we've tracked plus the number of user suggested alternatives.
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promises

Posts with mentions or reviews of promises. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2023-04-17.

async

Posts with mentions or reviews of async. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2022-10-27.
  • Is it possible that PHP will ever get async/await functions?
    9 projects | /r/PHP | 27 Oct 2022
    Promises are a solution to asynchronicity in general. Promises are more of a specification, so anything claiming to implement Promises solves the same class of problem in the same way. Since php doesn't have language level wrappers for Await behavior it is going to look weird. Either you use something Object Oriented like Promises to handle the timing/async of your calls, or you use something functional like the pcntl functions to handle Process Control of multiple interdependent processes and the pipes/sockets between them. There are also separate Asnycronous libraries available that have a slightly different interface, but they probably just use promises in the backend. See https://github.com/reactphp/async and https://github.com/reactphp/promise for instance if you don't like curl.
  • What have fibers been used for so far?
    4 projects | /r/PHP | 28 Aug 2022
    ReactPHP uses Fibers through react/async starting from version 4 of the library.

What are some alternatives?

When comparing promises and async you can also consider the following projects:

FutureKit - A Swift based Future/Promises Library for IOS and OS X.

parallel - An advanced parallelization library for PHP, enabling efficient multitasking, optimizing resource use, and application responsiveness through multiple CPU threads.

PromiseKit - Promises for Swift & ObjC.

async - Easily run code asynchronously

React - Event-driven, non-blocking I/O with PHP.

Bolts-Swift - Bolts is a collection of low-level libraries designed to make developing mobile apps easier.

ext-openswoole - Programmatic server for PHP with async IO, coroutines and fibers

Bolts - Bolts is a collection of low-level libraries designed to make developing mobile apps easier.

asynchronous-php - List of resources for asynchronous programming in PHP

TopicEventBus - Publish–subscribe design pattern implementation framework, with an ability to publish events by topic.

framework-x - Framework X – the simple and fast micro framework for building reactive web applications that run anywhere.