?? $obj2 = $obj? ?? ?????? ???? ???. ?? ??? ?? ???? ????? $obj2 = new Demo(); ??? ?????
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$obj2=new Demo(); $obj2 =$obj; $obj = new Demo()? ??? ? ?? ? ??????.
![[? ?????] Node.js ?? ??](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
