1. Just like the title2. Code
a.php include(b.php); b(); b.php function b(){ echo 'What calls me is the second line of a.php'; }
The code is as above. How can we determine who called it in b and get the file name and line number
debug_backtrace()
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
debug_backtrace()