Thanks for this tip. Here is a way to automatically pepper this throughout your code:

cat program.php | sed 's/;$/; print FILE . " O.K. to line: " . LINE . "\n";/' > program-debug.php

Enjoy!

Fantastic. Now I have an include in all my pages, which can be called with: debug(); It's great!

function debug(){ echo "File:".FILE . "
Line:" .LINE."
"; }

the function won't work as far as I can see because it will always give you the line number of the function, not the calling code. Am I missing something?

Take a look at http://us2.php.net/manual/en/function.debug-backtrace.php this function provides more information and provides data on calling line & file

Thanks for this! I have the function set up to pass the line number to it by using a variable. I do not need the filename outputting myself.

function debug($lineno) { echo 'PHP line no: '.$lineno.''; }

debug(LINE);