PHPix2 Photo Album

I created a php form processor that takes the contents
of a text field and writes a [filename]_desc.txt file
in the correct location in relation to the file you
were viewing.

Now, the problem here is that there needs to be a way
to go into "admin mode" or something. The workflow
I've created is view an image as normal, and when I
get to one that doesn't have a _desc.txt file created
for it yet, I go to the http address bar in my browser
and change it from xxxx\view.php?xxxx to
xxx\view_admin.php?xxx

which isn't secure, so... I dunno what to say. it
works, but what can be done about the lack of
security? I don't know php that well to answer that
question. maybe a password that is set in config
file, and then along with the submit button, you need
to put in the password as well for the input to be
written to a file? Maybe...

Please pardon my icky code. it works, but it ain't
pretty.

-Steve