website hacked, database error – how to show clients a page

hi there,
the websites of some clients is hacked again. the last time i just need to restore a backup but now the databse is broken. i can’t fix this for now.
so, is there any possibility to create a php which will show instead of the warning message of the browser? i created a php which will show up if the database is broken. so i fixed that.

thanks a lot