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[Utility & Helpers](/categories/utility) 4. / 5. rikmeijer/functional-php ActiveLibrary[Utility & Helpers](/categories/utility) rikmeijer/functional-php ======================== Functional primitives for PHP 1.0(1y ago)01.2kMITPHPPHP ^7.1|~8 Since Aug 29Pushed 1y agoCompare [ Source](https://github.com/rikmeijer/functional-php)[ Packagist](https://packagist.org/packages/rikmeijer/functional-php)[ GitHub Sponsors](https://github.com/lstrojny)[ RSS](/packages/rikmeijer-functional-php/feed)WikiDiscussions main Synced 1mo ago READMEChangelog (1)Dependencies (3)Versions (2)Used By (0) Functional PHP: Functional primitives for PHP ============================================= [](#functional-php-functional-primitives-for-php) [![Test](https://github.com/lstrojny/functional-php/actions/workflows/test.yaml/badge.svg)](https://github.com/lstrojny/functional-php/actions/workflows/test.yaml) *NOTE:* functional-php used to come with a C extension that implemented most of the functions natively. As the performance differences weren’t that huge compared to the maintenance cost it has been removed. A set of functional primitives for PHP, heavily inspired by [Scala’s traversable collection](http://www.scala-lang.org/archives/downloads/distrib/files/nightly/docs/library/scala/collection/Traversable.html), [Dojo’s array functions](http://dojotoolkit.org/reference-guide/quickstart/arrays.html) and [Underscore.js](http://underscorejs.org/) - Works with arrays and everything implementing interface `Traversable` - Consistent interface: for functions taking collections and callbacks, first parameter is always the collection, then the callback. Callbacks are always passed `$value`, `$index`, `$collection`. Strict comparison is the default but can be changed - Calls 5.3 closures as well as usual callbacks - All functions reside in namespace `Functional` to not raise conflicts with any other extension or library [![Functional Comic](https://camo.githubusercontent.com/63becd4ac41d0a381f17d2b2c18487a2c0f7887c24a5638c83cf64f409889540/687474703a2f2f696d67732e786b63642e636f6d2f636f6d6963732f66756e6374696f6e616c2e706e67)](http://xkcd.com/1270/) Installation ------------ [](#installation) Run the following command in your project root: ``` composer require lstrojny/functional-php ``` Docs ---- [](#docs) [Read the docs](docs/functional-php.md) Contributing ------------ [](#contributing) 1. Fork and `git clone` the project 2. Install dependencies via `composer install` 3. Run the tests via `composer run tests` 4. Write code and create a PR Mailing lists ------------- [](#mailing-lists) - General help and development list: - Commit list: Thank you --------- [](#thank-you) - [Richard Quadling](https://github.com/RQuadling) and [Pierre Joye](https://github.com/pierrejoye) for Windows build help - [David Soria Parra](https://github.com/dsp) for various ideas and the userland version of `Functional\flatten()` - [Max Beutel](https://github.com/maxbeutel) for `Functional\unique()`, `Functional\invoke_first()`, `Functional\invoke_last()` and all the discussions - [An Phan](https://github.com/phanan) for [many](https://github.com/lstrojny/functional-php/pulls?q=author%3Aphanan)great contributions ### Health Score 26 — LowBetter than 43% of packages Maintenance34 Infrequent updates — may be unmaintained Popularity15 Limited adoption so far Community19 Small or concentrated contributor base Maturity34 Early-stage or recently created project Bus Factor1 Top contributor holds 86.1% 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 Unknown Total 1 Last Release 626d ago ### Community Maintainers ![](https://www.gravatar.com/avatar/9d386b4ade493b5756f5e89ea5cd6e7272b0858d26ca88ffddfcaab76b2e1bc7?d=identicon)[rikmeijer](/maintainers/rikmeijer) --- Top Contributors [![lstrojny](https://avatars.githubusercontent.com/u/79707?v=4)](https://github.com/lstrojny "lstrojny (469 commits)")[![phanan](https://avatars.githubusercontent.com/u/8056274?v=4)](https://github.com/phanan "phanan (11 commits)")[![rquadling](https://avatars.githubusercontent.com/u/12801?v=4)](https://github.com/rquadling "rquadling (6 commits)")[![alexeyshockov](https://avatars.githubusercontent.com/u/203120?v=4)](https://github.com/alexeyshockov "alexeyshockov (5 commits)")[![jasonmm](https://avatars.githubusercontent.com/u/2171623?v=4)](https://github.com/jasonmm "jasonmm (5 commits)")[![szepeviktor](https://avatars.githubusercontent.com/u/952007?v=4)](https://github.com/szepeviktor "szepeviktor (4 commits)")[![gabrielhomsi](https://avatars.githubusercontent.com/u/9436096?v=4)](https://github.com/gabrielhomsi "gabrielhomsi (4 commits)")[![rodnaph](https://avatars.githubusercontent.com/u/447579?v=4)](https://github.com/rodnaph "rodnaph (3 commits)")[![bor0](https://avatars.githubusercontent.com/u/1620929?v=4)](https://github.com/bor0 "bor0 (3 commits)")[![krtek4](https://avatars.githubusercontent.com/u/963772?v=4)](https://github.com/krtek4 "krtek4 (3 commits)")[![someonewithpc](https://avatars.githubusercontent.com/u/4998043?v=4)](https://github.com/someonewithpc "someonewithpc (3 commits)")[![leocavalcante](https://avatars.githubusercontent.com/u/183722?v=4)](https://github.com/leocavalcante "leocavalcante (2 commits)")[![rikmeijer](https://avatars.githubusercontent.com/u/448159?v=4)](https://github.com/rikmeijer "rikmeijer (2 commits)")[![soutoner](https://avatars.githubusercontent.com/u/2651613?v=4)](https://github.com/soutoner "soutoner (2 commits)")[![adrienbrault](https://avatars.githubusercontent.com/u/611271?v=4)](https://github.com/adrienbrault "adrienbrault (2 commits)")[![pyldin601](https://avatars.githubusercontent.com/u/8050895?v=4)](https://github.com/pyldin601 "pyldin601 (2 commits)")[![colinodell](https://avatars.githubusercontent.com/u/202034?v=4)](https://github.com/colinodell "colinodell (2 commits)")[![mschwager](https://avatars.githubusercontent.com/u/1724818?v=4)](https://github.com/mschwager "mschwager (2 commits)")[![dsp](https://avatars.githubusercontent.com/u/14013?v=4)](https://github.com/dsp "dsp (2 commits)")[![peter279k](https://avatars.githubusercontent.com/u/9021747?v=4)](https://github.com/peter279k "peter279k (2 commits)") --- Tags functional ### Code Quality TestsPHPUnit Code StylePHP CS Fixer ### Embed Badge ![Health badge](/badges/rikmeijer-functional-php/health.svg) ``` [![Health](https://phpackages.com/badges/rikmeijer-functional-php/health.svg)](https://phpackages.com/packages/rikmeijer-functional-php) ``` ### Alternatives [lstrojny/functional-php Functional primitives for PHP 2.0k7.3M48](/packages/lstrojny-functional-php)[nikic/iter Iteration primitives using generators 1.1k5.9M38](/packages/nikic-iter)[lambdish/phunctional λ PHP functional library 3612.0M23](/packages/lambdish-phunctional)[ihor/nspl Non-standard PHP library (NSPL) - functional primitives toolbox and more 381368.5k](/packages/ihor-nspl)[qaribou/immutable.php Immutable, highly-performant collections, well-suited for functional programming and memory-intensive applications. 344146.0k](/packages/qaribou-immutablephp)[crell/fp Functional utilities for PHP 8 and later 91429.8k11](/packages/crell-fp) PHPackages © 2026 [Directory](/)[Categories](/categories)[Trending](/trending)[Changelog](/changelog)[Analyze](/analyze)