gistfile1.php

class Service_Exception
{
  private $errors;
  
  public put($errorCode, $errrorMessage="Undefined" ) 
  {
      array_push(
  }
 
  public throwIfAnyException()
  {
    if ( !empty($errors)) {
         throw new Exception(serialize($errors);
    }
  }


  public static resolveExceptions($errors) {
      return unserialize($errors);
  }
 
}


abstract class Service_Common_Abstract
{
   private $serviceException;
   
     public __construct() {
        $this->serviceException = new ServiceException();
    }
}


class UserService  extends Service_Common_Abstract implements UserService_Interface{

     public  function register() {

       if ( $this->isUserExists($user) ) {
          $this->serviceException->put(1,"USER_ALREADY_EXISTS");
       }
    
       if ( $this->isEmailExists($User) ) {
          $this->serviceException->put(2,"EMAIL_ALREADY_EXISTS");
       }

       $this->serviceException->throwIfAnyException();
    }
}



class userController {
   function index() {
       try {
          $user = new ServiceUser();
          $user->register($user);
       }
       catch(Exception $e) {
           Service_Exception::resolveException($e->getMessage());
       }
   }
}