Not very important, but graphic rules are useful to let admins work fast.
It is in the context of function admin_form(&$qa_content) { } in the admin script of a plugin
It returns an array with a 'ok' field . In most cases , if the input is rejected , it is empty.
Is there a conventionnal return to get a red header ( instead of green ) ?
or did you see a plugin using this red header after user input errors ?
thank you