MVC stands for Model , View and controller . View is Html controllers for PHP application , Controllers normally grab the request and call for Model layer . Model layer can be split into DAO ,Service and Entity layers

Most of the latest PHP frameworks support to develop  MVC applications. Zend and Symfony facilitate with Front Controller pattern and MVC pattern. Front Controller pattern means all application requests come through one single file ( basically via index.php file)

View

Xhtml , Javascript , CSS are used in this layer. Modern applications replace java script with browser-compatibility Jquery. CSS chunks it for screen.css , form.css, table.css and print.css .

Controller

Controller is for handling the actions of an application. Zend Framework provide Zend_Controller_Action base class and Symfony provide sfActions base class for handling incoming request of application

Model

Doctrine ORM come to picture and replaces DAO and Entity layer of modern days PHP application. All the relations can be defined in .yml file and auto-generate the entity class and populate the widely used database. Doctrine is provided with DQL which is portable in many popular databases.

we can implement Service layer of the application by applying widely-known design patterns.