Performance improvement: Run the file-check at login-only

[lat9]

As suggested by @scottcwilson, as a performance improvement, run the file-check only during admin-login. The functionality would otherwise remain the same.

[lat9]

While this would be a "good idea", I'm wont to require a change to the admin-level login script just to add a notification. I'm also looking to see if the $_SERVER['HTTP_REFERER'] indicates a login request and I'll try heading down that path.

[scottcwilson]

I would just create a session variable and set it once when done. Keep it simple! :)

[lat9]

That's a good idea, but the approach that I've taken is to run the file check if

1. The current page is not the login one.
2. The previous page was the login one (as determined via the HTTP_REFERER.

I think that's just as simple!