Have you ever actually tried to install Laravel, devs?
Here's a "fun" adventure:
Create new system. Follow the guide on website. Spit fire and lava. Quit after three days.
Totally by accident find that you need to wget composer.phar from obscured reply comment on some random youtube video. Even though you went through all the steps to install composer and PHP before. But.. now It works?
Try same on Docker. Spit more fire and lava.
Why can't you make an actual guide? I mean, the one where you actually try all those steps, install everything needed and so on? How hard is it to spend half an hour to ensure your product is actually usable?
@InC This shows that you have a lack of knowledge in PHP.
Laravel is a PHP framework and before wanting to use Laravel, it's important to have very good knowledge in PHP, package installation via composer, OOP, ...
As @merklin specified, the documentation is for Laravel and not for PHP.
Just don't criticize the Laravel documentation, it's a very very good documentation, but don't hesitate to ask for help. Here on Laracast there are several developers who are very experimented in developing with Laravel and can answer to your questions.
The documentation is for Laravel and is very complete. If you have problems installing composer, write in their forum, not here. Those are 2 completely different things.