Show executed line of code of script.

I'm trying to trace executed lines of code of a script I have.

I once had a piece of code that would display to me the code that was executed in a script, but can no longer find that piece of code.

I was wondering if there is any code / script that will dump the executed code into a file or display it on the screen.

 

Does anyone have any ideas?

It can be server side and dump the file into a txt file or something.

 

nope, you have to trace yourself, like insert in every line an echo or throw an exception