php可以动态的new一个变量类名

<?php
    header("content-type:text/html; charset=utf-8");
    //echo ucfirst('a b');class Student{
    private $xh;
    private $name;function __construct($id,$name){
        $this->id = $id;
        $this->name = $name;
    }
    function hello(){
        echo '我的学号是：'.$this->id.'我的名字是：'.$this->name;
    }
}
$className = 'Student';
$stu = new $className('123456','abc');
$stu->hello();
?>