I have a script that uses imagemagick's convert command on the commandline
to get it's work done.
These calls to exec('convert [params]') take params from the end-user via a
html form, so is very unsecure.
The intention is that the end-user only runs this script on localhost, from
So now i'm checking $_SERVER['REMOTE_ADDR']===$_SERVER['SERVER_ADDR'] to
see if I can allow the script to be used.
But unfortunately, $_SERVER['REMOTE_ADDR'] is my external IP, and
$_SERVER['SERVER_ADDR'] is my internal IP.
How would I best fix this?