Functional PHP

Functions always take the collection first and callback second, with callbacks receiving $value, $index, and $collection, making the API predictable and reducing boilerplate, as emphasized in the README.

Works with arrays and any Traversable objects, enabling functional operations across diverse collection types without conversion, enhancing flexibility in PHP projects.

All functions reside in the Functional namespace, preventing naming conflicts with other libraries or PHP's built-in functions, ensuring clean integration.

Based on Scala's Traversable and Underscore.js, it brings proven functional patterns to PHP, offering a robust set of primitives for declarative coding.