This filter is applied within the bcn_breadcrumb_trail class in the post_hierarchy() function. This filter was introduced in version 5.4 with three parameters. In version 5.5 a fourth parameter was added. It receives four parameters:

  • $term(WP_Term|boolean)(required) The term object returned by bcn_breadcrumb_trail::pick_post_terms() to filter (note that this parameter may be the boolean value false)
  • $id(id)(optional) The ID of the post this term is for
  • $type(string)(optional) The post type name for the post represented by the ID in the second parameter
  • $taxonomy(string)(optional) The name of the taxonomy the term belongs to