复制代码 代码如下:

<?php
 class Cart{
  public function Cart(){
   echo \"正在调用Cart()<br />\";
  }
  public function doSomething(){
   echo \"正在调用doSomethimg()<br />\";
  }
 }
 class Named_Cart extends Cart{
  function Named_Cart(){
   echo \"正在调用Named_Cart()<br />\";
  }
  function doSomething(){
   echo \"正在调用Named_Cart::doSomething()<br />\";
  }
 }
$myCart=new Cart();
$myCart->doSomething();
$myNamed_Cart=new Named_Cart();
$myNamed_Cart->doSomething();
?>