PHP面向对象概念与实例_PHP教程

/*
* 定义了 User接口.
* 和子类 NormalUser,VipUser,InnerUser
*/
//User接口,定义了三个抽象方法.
interface User{
 public function getName();
 public function setName($_name);
 public function getDiscount();
}
abstract class AbstractUser implements User{
 private $name = ""; //名字
 protected  $discount = 0; //折扣
 protected  $grade = "";  //级别
 
 public function __construct($_name){
  $this->setName($_name);
 }
 public function getName(){
  return $this->name;
 }
 public function setName($_name){
  $this->name = $_name;
 }
 public function getDiscount(){
  return $this->discount;
 }
 
 public function getGrade(){
  return $this->grade;
 }
}
class NormalUser extends AbstractUser  { 
 protected  $discount = 1.0;
 protected  $grade = "NormalUser";
}

class VipUser extends AbstractUser {
 protected  $discount = 0.8;
 protected  $grade = "VipUser";
}

class InnerUser extends AbstractUser {
 protected  $discount = 0.7;
 protected  $grade = "InnerUser";
}
?>

include_once("./class/User.php");
include_once("./class/Product.php");
include_once("./class/ProductSettle.php");

$number = 10;
$book = new BookOnline("设计模式");

$user = new NormalUser("Tom");
$price = ProductSettle::finalPrice($user,$book,$number);
$str =  "您好，尊敬的用户 " . $user->getName() . "
";
$str .= "您的级别是 ". $user->getGrade() .",
";
$str .= "您的折扣是 " . $user->getDiscount() . "
";
$str .= "购买 $number 本 《 ". $book->getProductName() ;
$str .=  "》的价格是 $price

";
echo $str;

$user = new vipUser("Tom");
$price = ProductSettle::finalPrice($user,$book,$number);
$str =  "您好，尊敬的用户 " . $user->getName() . "
";
$str .= "您的级别是 ". $user->getGrade() .",
";
$str .= "您的折扣是 " . $user->getDiscount() . "
";
$str .= "购买 $number 本 《 ". $book->getProductName() ;
$str .=  "》的价格是 $price

";
echo $str;

$user = new InnerUser("Tom");
$price = ProductSettle::finalPrice($user,$book,$number);
$str =  "您好，尊敬的用户 " . $user->getName() . "
";
$str .= "您的级别是 ". $user->getGrade() .",
";
$str .= "您的折扣是 " . $user->getDiscount() . "
";
$str .= "购买 $number 本 《 ". $book->getProductName() ;
$str .=  "》的价格是 $price

";
echo $str;
?>