本文共 1268 字，大约阅读时间需要 4 分钟。

   name = $name;        $this->price = $price;    }    /**     * @return mixed     */    abstract protected function getName();    final public function getPrice()    {        return $this->price;    }}/** * Class book1 */class book1 extends goods1{    /**     * @return mixed|string     */    public function getName()    {        return '书名：《'.$this->name.'》';    }}$vBook1 = new book1('PHP入门基础教程',45);echo $vBook1->getName();echo "
";echo $vBook1->getPrice();echo '
   
';class phone1 extends goods1{    public function getName()    {        return '手机型号为：'.$this->name;    }}$vPhone1 = new phone1('三星',2999);echo $vPhone1->getName();echo "
";echo $vPhone1->getPrice();echo "
   
";/** * Interface usb1 */interface usb1{    public function connect();    public function transfer();    public function disconnect();}class mp31 implements usb1{    private $name;    public function __construct($name)    {        $this->name = $name;        echo $name.'MP3生成中 
';    }    public function connect()    {        return '开始连接
';    }    public function transfer()    {        return '开始传输.......传输结束
';    }    public function disconnect()    {        return '断开
';    }}$vmp3 = new mp31('大华');echo $vmp3->connect();echo $vmp3->transfer();echo $vmp3->disconnect();echo "
   
";