> What configuration error (technically, by definitions from some IEEE guidelines, mistakes) did they make to have this happening? They edited .php file on a p

> What configuration error (technically, by definitions from some IEEE guidelines, mistakes) did they make to have this happening? They edited .php file on a production server and made a typo, so the file, containing sensitive information started with "i?php" instead of "<?php". My guess that happened because someone used vi/vim and hit "i" twice.