php基础------私有字段取值赋值

<?php
    
class Person
{
    private $_name;
    //私有字段赋值
    public function __set($name, $value)
    {
        $this->$name = $value;
    }
    //私有字段取值
    public function __get($name)
    {
        return $this->$name;
    }
}

$p = new Person();
$p->_name = "小王";//自动调用__set()方法 
echo $p->_name;//自动调用__get()方法