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

# REPL with PHP

Experimentation is essential in programming, regardless of the programming environment. **Read-Eval-Print Loops (REPLs)** are a valid tool for testing ideas in programming because they’re user-facing interactive meta programs that parse text input and produce appropriate output.

PHP’s command-line strengths, though rarely emphasized, are helpful in this regard. Below is a list of REPLs that are capable of parsing expressions and evaluating them against the functional programming rules. Consider testing new ideas in the command line before applying them in production code.

## The `bingo-functional` REPL 

The `bingo-functional` REPL, built on top of ReactPHP, is a suite of asynchronous routines for PHP. The `bingo-functional` REPL makes available the artifacts present in its parent library to those who use it. This shell also provides simple documentation for the functions present in the `bingo-functional` package and some informative text on the operations it allows.

### Try it yourself

Try executing the `help` command in the terminal below:

Learn about some REPL environments in PHP for functional programming.

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

REPL Environments For Functional Programming

REPL with PHP