php - Zend Framework 2: Extend ZfcUser with own fields
There are two possible methods:
Build custom classes extending ZfcUser's entity, form and input filter and add your custom fields. In the ZfcUser configuration change aliases or override factories to ensure your custom classes are instantiated rather than the built in ones.
If you are OK with having the custom profile fields stored and accessed separately from the ZfcUser user entity, check out my module on GitHub: LdcUserProfile. It provides a profile system for ZfcUser but also makes it easy to add your own custom profile fieldsets linked to a user.