It's pretty easy to check if a page is a PHP page: just add a .php suffix, it'll work most of the time depending on where the files are placed in the web directory (also technically depending on how the site implements URL rewrite rules):

* https://spacehey.com/index.php

* https://spacehey.com/browse.php

* https://spacehey.com/reset.php

Here you can see that /help/ is a directory on the filesystem, as it appends a slash at the end:

* https://spacehey.com/help -> goes to https://spacehey.com/help/

and can also be confirmed by trying index.php at that path:

* https://spacehey.com/help/index.php