PHP MVC模式在网站架构中的实现(1)(3)

＜?php 
/** 
*  Controls the application 
*/ 
class ProductController extends ProductView { 

    //! A constructor. 
    /** 
    * Constucts a new ProductController object 
    * @param $model an instance of the ProductModel class 
    * @param $getvars the incoming HTTP GET method variables 
    */ 
    function ProductController (&$model,$getvars=null) { 
        ProductView::ProductView($model); 
        $this-＞header(); 
        switch ( $getvars['view'] ) { 
            case "product": 
                $this-＞productItem($getvars['id']); 
                break; 
            default: 
                if ( empty ($getvars['rownum']) ) { 
                    $this-＞productTable(); 
                } else { 
             $this-＞productTable($getvars['rownum']); 
                } 
                break; 
        } 
        $this-＞footer(); 
    } 
} 
?＞

＜?php 
require_once('lib/DataAccess.php'); 
require_once('lib/ProductModel.php'); 
require_once('lib/ProductView.php'); 
require_once('lib/ProductController.php'); 

$dao=& new DataAccess ('localhost','user','pass','dbname'); 
$productModel=& new ProductModel($dao); 
$productController=& new ProductController($productModel,$_GET); 
echo $productController-＞display(); 
?＞

$this->{$_GET['method']}($_GET['param']); 

"index.php?class=ProductView&method=productItem&id=4"

$view=new $_GET['class']; 
$view->{$_GET['method']($_GET['id']);