As part of my neverending quest towards improving my programming skills and learning new patterns and algorithms, I had the idea of finding myself a well-defined challenge I can conquer from start to finish. After a bit of searching, I found one: programming a Sudoku puzzle game.

cURL is a PHP library that’s meant to safely retrieve remote data. The term ‘safely’ is a relative one, of course, depending on what you do with it. But since cURL doesn’t generally execute the fetched data, it is considered much safer than many other options.