kategorie per funktion anlegen aber wie?

Schau Dir am besten an, was bei WordPress passiert, wenn Du im Backend eine Kategorie anlegst. Das müsstest Du dann ins Plugin entsprechend analog einbauen.

Function Reference « WordPress Codex
Rein vom Namen her: register_taxonomy(). Ist aber leider im Codex nicht dokumentiert.

Aber vielleicht hilft dir das hier:

Zitat

register_taxonomy( $taxonomy, $object_type, $args = array() X-Ref
register_taxonomy() - Create or modify a taxonomy object.

A simple function for creating or modifying a taxonomy object based on the parameters given.
The function will accept an array (third optional parameter), along with strings for the
taxonomy name and another string for the object type.

The function keeps a default set, allowing for the $args to be optional but allow the other
functions to still work. It is possible to overwrite the default set, which contains two
keys: hierarchical and update_count_callback.

hierarachical has some defined purpose at other parts of the API and is a boolean value.

update_count_callback works much like a hook, in that it will be called (or something from
somewhere).

param: string $taxonomy Name of taxonomy object
param: string $object_type Name of the object type for the taxonomy object.
param: array|string $args See above description for the two keys values.
return: null Nothing is returned, so expect error maybe or use is_taxonomy() to check.

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