a better way to do date modified script?

[webguync]

I have a small script on the bottom of all my pages on my site which list the date and time the page was modified. I want to make the script an include and just put that on the page, but as it is now scripted that won't work since you have to change the page name for every page. Is there a way to change this so it can be an include?

$last_modified = filemtime("pagename.php");
print("Last Modified ");
print(date("m/j/y h:i", $last_modified));?>

[mikecampbell]

$last_modified = filemtime($_SERVER['SCRIPT_FILENAME']);

[webguync]

awesome thanks!