Is there any way to get the existing subdirectories and files from an URL?

Imagine you have your file with url http://my.page/folder_1/file_1.php

I want to know if there's some software/command/script to get the subfolders/files given an url.

For example:

Input argument: http://my.page/folder_1/

Output:

http://my.page/folder_1/file_1.php [file]
http://my.page/folder_1/folder_1a  [dir]

I don't even know if that's possible, but hope for it to be

Thanks for the help!