validation callback rules and dynamic text in the error mesage

[eluser]deanf7[/eluser]
if it helps anyone else I figured this one out.

You'd write your callback message to read like this:

Code:

$this->form_validation->set_message('checkActivities', "If you checked (%s) as completed, please list the number of minutes spent on the activity.");

Then in your form validation you'd write something like:

Code:

$this->form_validation->set_rules('rev_agenda_time', 'Review Agenda', 'callback_checkActivities[rev_agenda, rev_agenda_time]');

Which prints : If you checked (Review Agenda) as completed, please list the number of minutes spent on the activity.