Gain insights into functional programming in PHP. Learn about pure functions, immutable data, and monads. Explore error handling and apply principles through practical projects.

fp15aug.tar.gz

php7.4

ch8-phonebook

php8.1

purescript

python-pytoolz

chapter5-challenge1

AMQP

eris-testing-lesson

AMQP-Challenge

eris-testing-challenge

Functional programming is a paradigm that emphasizes expressing program logic as compositions of pure functions. PHP is a good fit for functional programming as functions are first-class citizens in its userland.
 
This course introduces you to the core concepts of functional programming, like pure functions, immutable data structures, and referential transparency. From there, you'll explore ways to handle errors with default values and callbacks while also exploring sum types such as Either or Maybe. Next, you'll look at functors before diving deep into monads, including IO, State, Reader, and List.
 
By the end of this course, you'll have a keen understanding of how to apply these principles in practice through a worked-out project. Not only will you know another way to program, but you’ll also feel confident enough to apply these ideas to your projects in PHP.

Learn Functional Programming in PHP

## Overview

When a function produces an immutable result, it’s always possible that it modifies an external state in the process. This is especially visible in value objects and persistent data structures where artifacts, such as iterative control structures, create multiple encapsulated data structures before producing a single result. **Transients** allow for the exertion of control in situations where some form of mutation is common and offer a non-trivial performance benefit in languages like Clojure. Using the principle of transient mutation, it's possible to mimic the concept for PHP.

## The `TransientMutator` trait

Because the purpose of a transient is to control mutation, its internal structure should contain procedures for checking whether a mutation has occurred and for producing a new copy of an object’s state. 

### The transient trait in in the `bingo-functional` library

An example of the `TransientMutator` trait in the `bingo-functional` library is shown below:

# Overview

When a function produces an immutable result, it’s always possible that it modifies an external state in the process. This is especially visible in value objects and persistent data structures where artifacts, such as iterative control structures, create multiple encapsulated data structures before producing a single result. **Transients** allow for the exertion of control in situations where some form of mutation is common and offer a non-trivial performance benefit in languages like Clojure. Using the principle of transient mutation, it's possible to mimic the concept for PHP.

# The `TransientMutator` trait

Because the purpose of a transient is to control mutation, its internal structure should contain procedures for checking whether a mutation has occurred and for producing a new copy of an object’s state. 

## The transient trait in in the `bingo-functional` library

An example of the `TransientMutator` trait in the `bingo-functional` library is shown below:

Learn about Transient Mutation and its supporting packages in PHP.

Getting Started

An Introduction to Functional Programming in PHP

Core Concepts: Functional Programming in PHP

Composition and Helper Functions

Error Handling in Functional Programming

Functors in PHP

Parallelization of Tasks in PHP

Recursion, Pattern Matching, and Property Testing

Phonebook Application — A Simple Project

Conclusion

Appendix

Transient Mutation

Overview

The `TransientMutator` trait

The transient trait in in the `bingo-functional` library