<?php

header('Content-type:text/html;charset=utf-8');

class Staff

{

    private $name ;

  //  public $age ;

//public $salary;

    就是这里 不可以 把age 및salary 改成私有 

    공용 함수 __construct($name,$age,$salary)

    {

        $this->이름 = $ name;

        $this->age = $age;

        $this->salary =$salary;

    }

    공용 함수 __get($name)

    {

        $this->이름을 반환합니다. ;

    }

    공용 함수 __set($name,$value)

    {

        if($name ==='age')

        {

           반환 fal se;

        }

         $this-> name=$value;

    }

}

 $obj=new Staff('22',24,500);

 //echo $obj->name;

 echo $obj->age;

 echo '<hr>';

 echo $obj->name;

 echo '

 echo $obj->salary;