Password protecting one file

[Assgoblin]

Is there a way I can password protect one file securely? Either using PHP or some feature in control panel... There only needs to be one password, not necessarily a username and no group permissions. Just a password protected file. (No I don't want to put it in another directory)

[g1smd]

It is very easy to password protect a folder, using .htaccess.

I would recommend using that.

[physics]

I agree. It might be a pain for you to put this file in another directory but not as much of a pain as it will be to try to write a custom password protection script.