Rewriting a medium sized application in OO

I would probably do the following while converting my application to MVC:

• Determine the purpose of each function (processes query parameters, outputs data, queries the database?)
• Try refactoring the functions that do all of the above, breaking them down into functions that do nothing more than one of these things.

• For each function, try to find a suitable top object / class that can contain that function as a method

  function addUserRecord($dbHandle, $userData) {[...]} 
  // Becomes
  class User {
      private $db;
      public function addUser($data) {
          [...]
      }
  }
  
        
  
          
          
          
        
  
      

• For every single * .php file accessible from the outside, turn it into an action of the corresponding controller:

  http://foo.bar.com/user/addUser.php // becomes
  http://foo.bar.com/user/add-user

  Relevant controller using Zend_Framework

  class UserController extends Zend_Controller_Action {
      public function addUserAction () {
         [...]
      }
  }
  
        
  
          
          
          
        
  
      

• Move all output, such as echo, into views.

The hardest part will probably be creating the right models, but this is very important and will become the foundation of your application.