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','谭斌');
$stu->hello();
?>