Teacher, I followed your operation step by step. When it comes to encapsulating the database access class, the web page prompts: Page error, please try again later!
I assign simple numbers to $res and it can be displayed normally.
Try to enable debug first to see what went wrong
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
Try to enable debug first to see what went wrong