PHP魔术方法:__set

<?php

class dog{

    private $sname;

    // private $age;

    public function __set($var,$val){

      $this->$var=$val;

    }

    public function __get($var){

        return $this->$var;

    }

}

$stmt=new dog;

$stmt->sname='hjf';

echo $stmt->sname;

?>