Organizing files and folders structure

Question

I've been working with web-based solutions for some years now, Mostly PHP and WordPress projects, as this refers to. I'm not quite sure, if I structure my projects in the best way.

So, how do I structure my project in the right way?

For example, I have a project where i use Yarn for package control and gulp for my SASS and jQuery. Here my structure looks like this:

• assets

  • css
    • style.css
    • style.min.css
  • sass
    • style.scss
  • js
    • scripts.js
    • scripts.min.js
  • img

• node_modules

  • Bootstrap
  • jQuery
  • And so on

• root

  • header.php
  • index.php
  • page.php
  • footer.php
  • gulpfile.js
  • package.json
  • yarn.lock

Isn't there a best practice on this? I can't find any professional page telling about this, and those that do exist, says different things.. There must be some type of guideline, even though everyone is different.

Answer 1

There is one result of the research effort scanning every package listed on https://packagist.org detailing which directories are being used by the vast majority of packages, i.e. what most people unconsciously agreed upon without coordination:

https://github.com/php-pds/skeleton

The short summary for directories:

If a package has a root-level directory for ...     
                            ... then it MUST be named:
command-line executables    bin/
configuration files         config/
documentation files         docs/
web server files            public/
other resource files        resources/
PHP source code             src/
test code                   tests/