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

# Problem statement

Write a program similar to the previous challenge that performs the same formatting on sentences, but this time facilitated by `RabbitMQ` message brokerage.


## Formatting rules

- Remove any dots or underscores from the start.
- Append a period at the end.
- Convert any starting lowercase character to its uppercase version.


## Example sentences

Consider the list of sentences below to apply the encoding and the formatting:

align-center

> **Tip:** Name your queue `format_sentence`
 and do any printing to standard output using `IO/_print` or a similar function.

# Try it yourself

Follow the steps given below to run the application after writing code for `producer` and `consumer`:
 
1. Click the "Run" button below.
2. When the server is up and all plugins are enabled, run the following command in the terminal to run the consumer side of the application:

    ```Dockerfile
    php7.4 consumer.php
    ```
 
3. Next, click the "$\uplus$" button to open a second terminal and run the following commands in it:

    ```Dockerfile
    cd courseallcodes
    php7.4 producer.php
    ```

Test your knowledge by writing code to encode and format sentences using the RabbitMQ extension.

Original sentence	Formatted sentence
they waltered gracefully through the air	They waltered gracefully through the air.
.melodic rain bounces off the building rooftop.	Melodic rain bounces off the building rooftop.
__Meteors created a sky-symphony of light	Meteors created a sky-symphony of light.

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

Challenge 2: Sentence Formatting Using RabbitMQ

Problem statement

Formatting rules

Example sentences