The PHP class knowledge ---- clone machine test method

<?php
class mycoach
{
    public function  __construct($name,$age)
    {
        $this->name = $name;
        $this->age = $age;
    }
}
$cpc = new mycoach("陈培昌",22);
$cj = $cpc;
var_dump($cj,$cpc);
$cj2 = clone $cpc;
var_dump($cj2,$cpc);

?>