4-7-3.php

来自「php电子书」· PHP 代码 · 共 29 行

4-7-3.php
<br>instanceof运算符.<br>
<?
class User{
	private $name;
	public function  getName(){
		return "UserName is ".$this->name;
	}
}

class NormalUser extends User {
	private $age = 99;
	public function getAge(){
		return "age is ".$this->age;
	}
}

class UserAdmin{ //操作.
	public static function  getUserInfo(User $_user){
		if($_user instanceof NormalUser ){
			echo $_user->getAge();
		}else{
			echo "类型不对,不能使用这个方法.";
		}
	}
}
$User = new User(); // 这里new的是User.
UserAdmin::getUserInfo($User);
?>