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Why is my verification code not displayed?
There are many reasons why the verification code does not display. If you don’t read the code, I can’t tell you. But generally, most of the problems are just to add a clear cache in front of the code, that is, add this ob_clean() ;
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
There are many reasons why the verification code does not display. If you don’t read the code, I can’t tell you. But generally, most of the problems are just to add a clear cache in front of the code, that is, add this ob_clean() ;