Coupons Feed Meta
The Feed Object meta for the Coupons add-on is an associative array containing the properties which determine the type of coupon and discount available.
GFCoupons is the class which houses the main functionality of the Gravity Forms Coupons Add-on; it extends the GFFeedAddOn class which is part of the add-on framework.
This PHP filter allows custom logic to be used to determine if the coupon code can be applied.
This filter can be used to modify the coupon discount before it is applied to the form total.
Overrides coupon code alphanumeric checking.