Form Validation: "matches" and NOT required

[eluser]CroNiX[/eluser]
A way to get around that is to create dynamic validation rules, or a custom validation rule.

For dynamic, when creating your rules, do something like:

Code:

$first_field = $this->input->post('field_name');

if($first_field)
{
    //create your validation rule for 2nd field using matches to first field, and make it required
}
else
{
    //regular validation rules for 2nd field
}