If you are designing an application in PHP with using any Framework, you face many challenges like problems in re-using te code, coding from scratch, difficulty in testing, disorganization of codes etc. The solution is to use design patterns and one such design pattern is MVC ( Model View Controller ). MVC, or Model-View-Controller is a software architecture, or design pattern, that is used in software engineering, whose fundamental principle is based on the idea that the logic of an application should be separated from its presentation. MVC design pattern is used to separate an application’s data, business logic, and presentation; doing so facilitates the creation of more maintainable, reusable, and testable code. (a) Model - Data Layer (b) View - User Interface Layer (c) Controller - Interacts with the Model To know in detail about MVC Principles for PHP Developers, see the above presentation.