Action: wu_transition_product_billing_cycles

Fires when the billing cycles of a product transitions from one value to another.

This hook is fired by BerlinDB when a database UPDATE changes the billing_cycles column for a product row.

Parameters

Name	Type	Description
$old_value	`int`	The previous billing cycles value.
$new_value	`int`	The new billing cycles value.
$item_id	`int`	The product ID.