???? ??: 3. ??? ????? unset() ??? ?????. ??? ?? ????? var_dump()? ?????.
?????. unset()? var_dump()? ??? ??????
??: https: // www.miracleart.cn/code/985.html
1
0
0
unset() ??? ??? ??? ???? ? ?????. ?? ??? ??? var_dump() ??? ??? ?? ??? ???? ? ?????.
![[? ?????] Node.js ?? ??](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
