How to get referring path?

[Anon]

Is there a function or predefined variable that returns just the path of the referring page/script and not the filename?

It seems like $HTTP_REFERER returns the full path (sometimes) but I'd like to just have the actual path WITHOUT the filename. For instance:

it returns: http://www.site.com/dir/page.html

but all I want is: http://www.site.com/dir

TIA
Paul

[[deleted]]

It's a trivial operation to remove the "filename" from HTTP_REFERER using something like substring....