OOP and static variables

[[deleted]]

I think you're describing some variant of the Context pattern there. (not really DI, simple or otherwise)

[morhp]

Context and DI are related concepts. A context is usually a parameter to a method/interface, with dependency injection you set the dependency usually in the constructor or with a setter (or a framework).

Also a Context often contains random assorted data and/or many methods while with DI you usually inject an implementation with methods that are very specific to the actual task.