Little independent applications

[eluser]breaddes[/eluser]
Is it an illusion that this can work in PHP? I am used to it from Java and it saves me a lot of time because it's just reusable components that can be integrated where ever I want. They work for themselves and might have public methods to get information or to set information.

That seemingly means that if I want to change a newsletter module in CI I have to change it in every place I use it.