UBB.threads PHP Forum Software Community Forums Resources and Customizing How Do I? How do you display line number?

What do you use to display a line number in a script. I see lists of posts "it's in xxxxx.pl, line 167" but when I open scripts with wordpad, notepad, etc. I can't find how to display a line number.

The only way I've been able to do this in the past is by viewing the page in CuteFTP but I no longer use it.