How do IoC containers work?

Question

PHP

Do I understand correctly that an ioc container is an object that, when the application starts, instantiates all objects previously registered using a string key and a function or closure callback?

Answer 1

Almost. Only the container is part of such a system, it stores dependencies.
Look at the simplest example: pimple.sensiolabs.org The source
is very simple: https://github.com/silexphp/Pimple/blob/master/src...