validation problem

[eluser]Chris Newton[/eluser]
You could also set the validation rules to check a callback function before the form will validate. Of course, this assumes you're pulling data from a form, and not just using the validation class by itself.

$rules['var'] = "required|min_length[5]|callback_variable_check";

Refer to the 'setting validation rules' of the documentation;
http://ellislab.com/codeigniter/user-gui...ation.html