Advent of Code is an Advent calendar of small programming puzzles for a variety of skill sets and skill levels that can be solved in any programming language you like. If you want to solve it in PHP, this library can help you with common tasks as input downloading or solutions running.
At first, install AdventOfCode for PHP as dependency via composer:
composer require pavelsterba/advent-of-code
It will add CLI located in vendor/bin/aoc. With it, you can configure it with:
php vendor/bin/aoc dotenv
One important think you need is value of your session cookie when you are logged in on Advent of Code website. Some small differences may exists between different browser, but basic way to find it is:
- Go to Advent of Code website.
- Make sure you are logged in.
- Open Developer Tools with
F12. - Go to
Applicationtab. - In left menu, click on
Cookiesitem and select Advent of Code domain. - Find cookie with name
sessionand copy its value.
Value of this cookie is sensitive information! Make sure it will not be commited publicly, so add .env (where is it stored in your computer) into .gitignore.
php vendor/bin/aoc dotenv [options]
Options:
-y, --year=YEAR Which year should be added as current
-s, --session=SESSION Session token for Advent of Code
Generate .env file during setup.
php vendor/bin/aoc input [options] [--] <day>
Arguments:
day Which day to download
Options:
-y, --year=YEAR Which year should be downloaded
-f, --force Download input without cache
Download input data for given day. It also creates boilerplate code for your solutions (more about it later).
php vendor/bin/aoc run [options] [--] <day>
Arguments:
day Which day to run
Options:
-y, --year=YEAR Which year are you solving
-f, --first Run first solution
-s, --second Run second solution
-t, --test Run on test data
Run solutions from generated boilerplate.
If you download input data with CLI and generate boilerplate, you will see that this library created some folder and files:
2022
└─ day-1
├─ intput.txt
├─ intput-test.txt
└─ solution.php
input.txt contains input data for your puzzle.
input-test.txt is by default empty file, but its purpose is to add example input data for puzzle to be able to run your solution against small dataset with expected output.
solution.php is main file for your solutions. It contains two method - first() and second() for easier and harder part of puzzle. Just return your solution value and run it.
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