<?php

class MyObject {

    function myMethod() {

        //标准功能

        echo "Standard Functionality\n";

    }

}

class MyOtherObject extends MyObject {

    function myMethod() {

        //添加一些新功能

        echo "New Functionality\n";

        //然后再调用MyObject中定义的原来的myMethod方法

        parent::myMethod();

    }

}

$obj = new MyotherObject();

$obj->myMethod(); //New Functionality Standard Functionality