CodeIgniter中这些文件的用途是什么？

Question

I have been working with CodeIgniter since 2 years. But I have no idea about following highlighted files.

1. What are them?
2. What happens if I remove them?

Answer 1

1. .editorconfig -> here's the website. It's a configuration file to keep settings / code styles for certain IDE's.

2. .gitignore is a file used by git version control system which tell it which files should be IGNORED by git.

3. composer.json is a file used by Composer dependency manager (for PHP libraries), and that file lists library dependencies, versions, required php extensions and their versions which are needed for the code to run properly.

4. contributing.md isn't a special file, it's just a markdown-formatted file that contains instructions left there by the author. You can see that StackOverflow, Github and many other popular programming-related websites use markdown and display it as nicely formatted HTML after parsing.

5. You should really know what GIT and Composer are, so I suggest checking out the links I posted and implementing a bit of google-fu to get up to speed with current tech!