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

## The State monad

A shared global state is amenable to mutation. A horde of undesired (often unmitigated) side effects can permeate through the global state through the routines and variables that use it. The essence of the State monad is the storage of an initial state and mutation of an existing one, usually an offshoot of an initial state.


# The State monad

A shared global state is amenable to mutation. A horde of undesired (often unmitigated) side effects can permeate through the global state through the routines and variables that use it. The essence of the State monad is the storage of an initial state and mutation of an existing one, usually an offshoot of an initial state.


Learn about some practical monads, such as State, Writer, and List.

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

Other Practical Monads

The State monad