__FILE__ and __LINE__

[Liquid Fire]

I want to get create a function the will print out the line a file that the function is called without having to pass it to them.  for example this:

<?php
function test($file = __FILE__, $line = __LINE__)
{
echo $file . '|' . $line;
}

test();
?>

will print the right file but line 2.  is there a way to get the line/file the function is being called from automatically without worrying about having to pass it every time I call the function?

[btherl]

This function can give you the caller's file and line number: debug_backtrace()