Tried URI::uri_string() but can't get it to work with the base_url.

URL: http://localhost/dropbox/derrek/shopredux/ahahaha/hihihi
Returns: dropbox/derrek/shopredux/ahahaha/hihihi

but http://localhost/dropbox/derrek/shopredux/ just returns an empty string.

I want the first call to return "ahahaha/hihihi" and the second to return "". Is there such a function?

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