Functional Programming in PHP
Functional Programming in PHP
About the Book
Functional Programming, a style predicated on the Lambda Calculus, is one of the more prominent trends in engineering today. For many, the style's verbiage is dishearteningly esoteric despite the salience of its many ideas in various codebases. PHP remains one of the most used languages for web development and has taken several leaps and bounds since its inception in the twentieth century - advancements that have rendered the language functional programming-amiable.
The book, Functional Programming in PHP, is an attempt to distill paradigm-centric ideas for PHP audiences - its purpose is to make sense of the abstruseness.
About the Author
About the Contributors
Reviewer
Mr. Cees-Jan Kiewiet is a Senior engineer at Usabilla and core maintainer of ReactPHP. Based in the Netherlands, he has over fifteen years of programming experience and is proficient in, besides PHP, Golang, and Java. Mr. Kiewiet loves to play video games, meet with developers at meetups, and bask in the tranquility of his garden when he is not breaking servers
Reviewer
Chun-Sheng, Li is a web backend developer from Taiwan, Taipei.
He is currently based in Hsinchu. Mr. Chun-Sheng is familiar with PHP and JavaScript. He loves to develop web applications, web services and some open source projects on Github.
In addition to PHP, He also loves to research other technologies. Like JavaScript, web security, Blockchain, and IOTA. He’s also a backend developer and works in Industrial Technology Research Institute. Mr.Chun-Sheng is a blog writer, open source project contributor and traveler.
Table of Contents
-
Introduction to Functional Programming in PHP
- A brief history of PHP
- A Brief History of Functional Programming
- Defining Functional Programming
- Functional Programming is a Declarative Paradigm
- The Benefits of Functional Programming
- Relevance to a PHP Developer
- Functional Programming in Other Contexts
-
Functional Programming Core Concepts
- Functions
- Functional Programming and Object-Oriented Programming
- Pure Functions
- Side-causes and side-effects
- Dealing with side-effects and side-causes
- A Brief Note About Type Signatures
- Immutability
- Constants in PHP
- Immutable lists
- Tries
- Value Objects
- Temporal Coupling
- Transient Mutation
- Referential Transparency
- REPL Environments for Functional Programming
-
Composition and Helper Functions
- Composing Functions
- Traditional Function Composition
- Point-free Function Composition
- Currying
- Partial Application
- Map, Filter, and Fold
- Transducers
- Helper Functions
-
Error Handling in Functional Programming
- Exceptions are Impure
- Working Without Exceptions
- Callbacks
- PHP Error Messages
- Default Values
- Sum and Union Types
- The Maybe Monad
- The Either Monad
- The Railway Pattern
-
Functors
- A Crashcourse in Category Theory
- Defining Category Theory
- What About Functors
- Functors in Programming
- Functors are Type Classes
- Functor Properties
- Monads
- Practical Monads
- Monad Functions
- The IO Monad
- The Reader Monad
- The State Monad
- The Writer Monad
- The List Monad
-
Parallelization of Tasks in PHP
- PHP's Capabilities
- Threading in PHP
- The pthreads extension
- parallel is a Better Threading Option
- Multiprocessing in PHP
- Message Brokers
-
Recursion, Pattern Matching and Property Testing
- Recursion
- Pattern Matching
- Property Testing
- A Simple Project
- Appendix
The Leanpub 45-day 100% Happiness Guarantee
Within 45 days of purchase you can get a 100% refund on any Leanpub purchase, in two clicks.
See full terms
Do Well. Do Good.
Authors have earned$10,795,682writing, publishing and selling on Leanpub, earning 80% royalties while saving up to 25 million pounds of CO2 and up to 46,000 trees.
Learn more about writing on Leanpub
Free Updates. DRM Free.
If you buy a Leanpub book, you get free updates for as long as the author updates the book! Many authors use Leanpub to publish their books in-progress, while they are writing them. All readers get free updates, regardless of when they bought the book or how much they paid (including free).
Most Leanpub books are available in PDF (for computers), EPUB (for phones and tablets) and MOBI (for Kindle). The formats that a book includes are shown at the top right corner of this page.
Finally, Leanpub books don't have any DRM copy-protection nonsense, so you can easily read them on any supported device.
Learn more about Leanpub's ebook formats and where to read them
Top Books
- #1
Aprendiendo Git
Miguel Angel Durán GarcíaGit no es complicado... ¡Si lo entiendes! 😜
¿Sientes que sabes usarlo porque has memorizado todos los comandos que necesitas? ¡Pero no entiendes qué hace cada cosa y por qué! Así es normal que, cuando exista un problema, te cueste resolverlo.
¡Con este libro vas a entender de una vez por todas todo lo que es Git y cómo sacarle provecho!
- #2
C++20
Rainer GrimmC++20 is the next big C++ standard after C++11. As C++11 did it, C++20 changes the way we program modern C++. This change is, in particular, due to the big four of C++20: ranges, coroutines, concepts, and modules.
- #3
Introducing EventStorming
Alberto BrandoliniThe deepest tutorial and explanation about EventStorming, straight from the inventor.
- #4
Functional Programming Made Easier
Charles ScalfaniA Functional Programming book from beginner to advanced without skipping a single step along the way.
In my 40 years of programming, I've felt that programming books always let me down, especially Functional Programming books. So, I wrote the book I wish I had 5 years ago.
Functional Programming will never be easy, but it can be easier.
- #5
Rector - The Power of Automated Refactoring
Matthias Noback and Tomas VotrubaLearn how to automatically and continuously upgrade and improve your PHP code base
- #6
Windows 10 System Programming, Part 2
Pavel Yosifovich - #7
OpenIntro Statistics
David Diez, Christopher Barr, Mine Cetinkaya-Rundel, and OpenIntroA complete foundation for Statistics, also serving as a foundation for Data Science.
Leanpub revenue supports OpenIntro (US-based nonprofit) so we can provide free desk copies to teachers interested in using OpenIntro Statistics in the classroom and expand the project to support free textbooks in other subjects.
More resources: openintro.org.
- #8
Atomic Kotlin
Bruce Eckel and Svetlana IsakovaFor both beginning and experienced programmers! From the author of the multi-award-winning Thinking in C++ and Thinking in Java and a Kotlin team member comes a book that breaks concepts into small, easy-to-digest "atoms," along with exercises supported by hints and solutions directly inside IntelliJ IDEA! Full support at www.AtomicKotlin.com.
- #9
Thinking with Types
Sandy MaguireThis book aims to be the comprehensive manual for type-level programming. It's about getting you from here to there---from a competent Haskell programmer to one who convinces the compiler to do their work for them.
- #10
Ansible for DevOps
Jeff GeerlingAnsible is a simple, but powerful, server and configuration management tool. Learn to use Ansible effectively, whether you manage one server—or thousands.
Top Bundles
- #1
CCIE Service Provider Ultimate Study Bundle
2 Books
Piotr Jablonski, Lukasz Bromirski, and Nick Russo have joined forces to deliver the only CCIE Service Provider training resource you'll ever need. This bundle contains a detailed and challenging collection of workbook labs, plus an extensively detailed technical reference guide. All of us have earned the CCIE Service Provider certification... - #2
Software Architecture for Developers: Volumes 1 & 2 - Technical leadership and communication
2 Books
"Software Architecture for Developers" is a practical and pragmatic guide to modern, lightweight software architecture, specifically aimed at developers. You'll learn:The essence of software architecture.Why the software architecture role should include coding, coaching and collaboration.The things that you really need to think about before... - #3
The Python Craftsman
3 Books
The Python Craftsman series comprises The Python Apprentice, The Python Journeyman, and The Python Master. The first book is primarily suitable for for programmers with some experience of programming in another language. If you don't have any experience with programming this book may be a bit daunting. You'll be learning not just a programming... - #4
Modern C++ Collection
3 Books
Get All about Modern C++C++ Standard Library, including C++20Concurrency with Modern C++, including C++20C++20Each book has about 200 complete code examples. Updates are included. When I update one of the books, you immediately get the updated bundle. You can expect significant updates to each new C++ standard (C++23, C++26, .. ) and also... - #7
Pattern-Oriented Memory Forensics and Malware Detection
2 Books
This training bundle for security engineers and researchers, malware and memory forensics analysts includes two accelerated training courses for Windows memory dump analysis using WinDbg. It is also useful for technical support and escalation engineers who analyze memory dumps from complex software environments and need to check for possible... - #9
Development and Deployment of Multiplayer Online Games, Part ARCH. Architecture (Vol. I-III)
3 Books
What's the Big Idea? The idea behind this book is to summarize the body of knowledge that already exists on multiplayer games but is not available in one single place.And quite a fewof the issues discussed within this series (planned as three nine volumes ~300 pages each), while known in the industry, have not been published at all (except for...
