jonbaldie / functions

v2.0.0 2026-10-28 10:31 UTC

Requires

• php: >=8.1
• ext-mbstring: *
• ext-openssl: *
• ext-pdo: *
• ext-sodium: *

Requires (Dev)

• phan/phan: ^5.3
• phpunit/phpunit: ^9.5
• rskuipers/php-assumptions: ^0.8.1

Unknown License

• Jonathan Baldie

Published on Packagist.org on 2026-10-28 10:32 UTC

README

PHP Functional Programming Skeleton Project

Functions is a PHP skeleton project built upon a foundation of pure functions. It's a fun personal project of mine but it is unit tested and stable, if you'd like to give it a go.

Just run this to get started:

composer create-project jonbaldie/functions my-project && cd my-project

Then to generate your front-end assets:

yarn install && yarn encore dev

Start a local PHP server:

cd public && php -S localhost:3000 index.php

Open http://localhost:3000 and you should see "It works!"

See the skeleton exploratory pass for setup and routing observations.

Wait, what's a "pure function"?

Pure functions map variables from an input and produce an output, with no observable side-effects. They're easily testable, can be moved anywhere, and used in any context with no unexpected effects. This concept comes from functional programming languages like Clojure, Scala, or Haskell.

Functional programming - an approach that holds pure functions at its core - is growing in popularity. Developers are challenging the utility of traditional methods that run the risk of producing code that's difficult to debug. What's simpler than a pure function that does nothing more than map an input to an output?