Composer autoload how does it work?

Question

PHP

Interested in the question does the composer load the libraries all at once or as they are actually used? I would like to save resources) there are some that I use very rarely in special. cases)

Answer 1

it loads only what is required in the code
, there the loader is added via php.net/manual/ru/function.spl-autoload-register.php

Answer 2

Oh :)
Composer simply downloads libraries to your project and writes them to autoload.
Autoload doesn't work like "load everything into me right now, hurry up!!!". It only works when referring to a class that is not in the current file.

Answer 3

Exactly as prescribed by smple , but with one caveat: composer must also be included in the project, and this is already through require_once('vendor/autoload.php')