How to use customer validation rules and error messages

[eluser]jprateragg[/eluser]
Ah. I have lots of fields I will need to do this to. So I'm guessing I'll have to create lots of functions for individual fields to compare post values. I guess that's not that bad as long as I keep all of them in the extended form validation library.

I'm also assuming I can create my own custom error messages for these functions:

Code:

$this->form_validation->set_message('custom_function', 'Error message goes here.');