This filter replaced rcp_get_upgrade_paths in version 3.0.
Filters the membership level upgrades that are available to this membership. This typically includes all active membership levels except the one this membership is already for.
- $upgrade_paths (array) - Array of membership level objects that the user is able to upgrade or downgrade the current membership to.
- $membership_id (int) - ID of the membership being checked.
- $membership (RCP_Membership) - Membership object.