Undefined array index: username
Print $data and you will know the problem
Capitalization issue
Urgent
It all says it’s username, can’t you find the problem yet?
![6{7DF[}NQQW03@U@83]79IN.png](https://pnpimg.jiaoben.net/upload/image/559/260/636/1565598682511177.png "1565598682511177.png")
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
Print $data and you will know the problem
Capitalization issue
Urgent
It all says it’s username, can’t you find the problem yet?