PHP Core

To give a simple analogy, developing a web application purely with core PHP is like solving a mathematical problem manually by writing down each step on the paper. On the other hand, using a framework is similar to using tools such as a calculator to solve a problem. Just as a calculator, the frameworks are useful tools for rapid application development. A web framework, especially a PHP framework is a collection of one or more PHP libraries and classes. It provides a generic functionality that allows the developer to concentrate more on the application logic, rather than writing code scratch. It provides a reusable software environment that quickly builds a minimal working template application.