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[Queues & Workers](/categories/queues) 4. / 5. kraken-php/promise ActiveLibrary[Queues & Workers](/categories/queues) kraken-php/promise ================== Kraken Framework Promise Component. v0.4.1(8y ago)41.8k19MITPHPPHP >=5.6.7 Since Sep 16Pushed 8y ago1 watchersCompare [ Source](https://github.com/kraken-php/promise)[ Packagist](https://packagist.org/packages/kraken-php/promise)[ Docs](http://kraken-php.com)[ RSS](/packages/kraken-php-promise/feed)WikiDiscussions master Synced 2mo ago READMEChangelogDependencies (1)Versions (9)Used By (9) Kraken Promise Component ======================== [](#kraken-promise-component) [![Build Status](https://camo.githubusercontent.com/af15010c36476fc4e6c49984421bf2b84750be2adc45fc8bebf1b90d9a7b52c3/68747470733a2f2f7472617669732d63692e6f72672f6b72616b656e2d7068702f6672616d65776f726b2e737667)](https://travis-ci.org/kraken-php/framework)[![Total Downloads](https://camo.githubusercontent.com/1462627b04aec315cdf338a2db8fc90fb48a384922fcb8a23531d6297b9b93f3/68747470733a2f2f706f7365722e707567782e6f72672f6b72616b656e2d7068702f70726f6d6973652f646f776e6c6f616473)](https://packagist.org/packages/kraken-php/promise)[![Latest Stable Version](https://camo.githubusercontent.com/a0837d94c2d8620fb4c88a9df6091c7065b5ee4d4f4cec912f469c9b5cc7a220/68747470733a2f2f706f7365722e707567782e6f72672f6b72616b656e2d7068702f70726f6d6973652f762f737461626c65)](https://packagist.org/packages/kraken-php/promise)[![Latest Unstable Version](https://camo.githubusercontent.com/52d586a4d690699c5bd2cf7e2a34f6f8c8b097f1dcc7c0e34336496e08ea1ac8/68747470733a2f2f706f7365722e707567782e6f72672f6b72616b656e2d7068702f70726f6d6973652f762f756e737461626c65)](https://packagist.org/packages/kraken-php/promise)[![License](https://camo.githubusercontent.com/7b3d640f212d4ca5dfa30751f70cef9fd309f7b19fdd33448b776f26fdfdd42f/68747470733a2f2f706f7365722e707567782e6f72672f6b72616b656e2d7068702f6672616d65776f726b2f6c6963656e7365)](https://packagist.org/packages/kraken-php/framework)[![Kraken Compatible](https://camo.githubusercontent.com/1b4bd0ba007b4666bb6e1a081a7aeeafd8c9cfcaeab74fc4121ac3e353e3b51f/68747470733a2f2f696d672e736869656c64732e696f2f62616467652f6b72616b656e2d636f6d70617469626c652d3662303261662e737667)](https://github.com/kraken-php/framework) > **Note:** This repository is a part of [Kraken Framework](https://github.com/kraken-php/framework), but **can be used freely as standalone library**. If you are interested in more asynchronous components for PHP, check out the rest of [Kraken repository](https://github.com/kraken-php) or see our [asynchronous application skeleton](https://github.com/kraken-php/kraken) example. Description ----------- [](#description) Promise is a component that provides PHP implementation of promises using Promise/A+ specification and additional promise-related concepts such as joining, mapping, reducing and cancelling promises. Feature Highlights ------------------ [](#feature-highlights) Promise features: - Implementation of promises using Promise/A+ specification, - Methods to resolve, reject or cancel promises, - Cancellation of promises using forget semantics, - Methods to join, map, race, reduce and do other things with set of promises, - Kraken Framework compatibility, - ...and more. Examples -------- [](#examples) See more examples in [official documentation](http://kraken-php.com/docs/api-promise). Requirements ------------ [](#requirements) - PHP-5.6 or PHP-7.0+, - UNIX or Windows OS. Installation ------------ [](#installation) ``` composer require kraken-php/promise ``` Tests ----- [](#tests) Tests are provided within our write-only [Framework repository](https://github.com/kraken-php/framework). Documentation ------------- [](#documentation) Documentation for this module can be found in the [official documentation](http://kraken-php.com/docs/api-promise). Contributing ------------ [](#contributing) This library is read-only subtree split of Kraken Framework. To make contributions, please go to [Framework repository](https://github.com/kraken-php/framework). License ------- [](#license) This library licensed under the MIT license, see more information in [Kraken Framework](https://github.com/kraken-php/framework) license section. ### Health Score 30 — LowBetter than 64% of packages Maintenance20 Infrequent updates — may be unmaintained Popularity23 Limited adoption so far Community16 Small or concentrated contributor base Maturity53 Maturing project, gaining track record Bus Factor1 Top contributor holds 100% of commits — single point of failure How is this calculated?**Maintenance (25%)** — Last commit recency, latest release date, and issue-to-star ratio. Uses a 2-year decay window. **Popularity (30%)** — Total and monthly downloads, GitHub stars, and forks. Logarithmic scaling prevents top-heavy scores. **Community (15%)** — Contributors, dependents, forks, watchers, and maintainers. Measures real ecosystem engagement. **Maturity (30%)** — Project age, version count, PHP version support, and release stability. ### Release Activity Cadence Every ~39 days Recently: every ~66 days Total 8 Last Release 3257d ago PHP version history (2 changes)v0.3.0PHP >=5.5.9 0.4.x-devPHP >=5.6.7 ### Community Maintainers ![](https://www.gravatar.com/avatar/edd40f7be77d3f9934f998dc0859d0562e42c715d61f5139feaf948a2fcb6050?d=identicon)[khelle](/maintainers/khelle) --- Top Contributors [![khelle](https://avatars.githubusercontent.com/u/5642657?v=4)](https://github.com/khelle "khelle (25 commits)") --- Tags asyncasynchronouspromisekrakenkraken-php ### Embed Badge ![Health badge](/badges/kraken-php-promise/health.svg) ``` [![Health](https://phpackages.com/badges/kraken-php-promise/health.svg)](https://phpackages.com/packages/kraken-php-promise) ``` ### Alternatives [amphp/amp A non-blocking concurrency framework for PHP applications. 4.4k123.4M323](/packages/amphp-amp)[revolt/event-loop Rock-solid event loop for concurrent PHP applications. 92343.6M138](/packages/revolt-event-loop)[amphp/parallel Parallel processing component for Amp. 85046.2M74](/packages/amphp-parallel)[icicleio/icicle Icicle is a PHP library for writing asynchronous code using synchronous coding techniques. 1.1k150.9k14](/packages/icicleio-icicle)[react/promise-timer A trivial implementation of timeouts for Promises, built on top of ReactPHP. 34141.9M96](/packages/react-promise-timer)[sabre/event sabre/event is a library for lightweight event-based programming 35227.4M25](/packages/sabre-event) PHPackages © 2026 [Directory](/)[Categories](/categories)[Trending](/trending)[Changelog](/changelog)[Analyze](/analyze)