Will there be any problems when upgrading from php5.3 to 7.2?
I also want to ask hahaha, I wonder if the higher version will not be compatible with the syntax of the lower version?
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
I also want to ask hahaha, I wonder if the higher version will not be compatible with the syntax of the lower version?