Composer is a tool for dependency management in PHP. It is not a package manager in the same sense as
Apt are. Yes, it deals with “packages” or libraries, but it manages them on a per-project basis, installing them in a directory (e.g.
vendor) inside your project. By default it does not install anything globally.
Laravel is a web application framework with expressive, elegant syntax. We’ve already laid the foundation — freeing you to create without sweating the small things.
Domain-driven design, DDD, is the concept that the structure and language of your code (class names, class methods, class variables) should match the business domain. Domain Driven Design (DDD) defines a number of concepts and patterns that help designing software effectively, in-line with the business requirements.