Get code line and file that's executing the current function in PHP?

Question

Imagine I have the following situation:

File1.php

Function.php

Answer 1

debug_backtrace() can be used to trace back through the call stack. It can be slow though, so be careful with it if you're doing a lot of logging.

If you're using PHP 5.3, you could take advantage of late static binding and have a base class method of log(), and your child classes could call it but still maintain static references to __FILE__ and __LINE__.

A final option would be just pass __FILE__ and __LINE__ in as parameters when you call your log() function.