not sure.
let me explain you.
lets say my website is working fine.
if i give a wrong database username/passowrd in the config.php
then when i try typing
www.mydomain.com
it will give a error page because it can not communicate with database as we gave a wrong username or password.
in this case it will give an error message with a header and footer.
I want to change that look of that error page.