displaying archive of parent & all sub categories (1 post)

  1. medicus
    Posted 9 years ago #

    As far as I understand, is_category() checks whether the category's archive page is being displayed, and in_category() checks whether a post has a specific category ID.

    How can I filter a post so that it will be from a parent category or any sub categories thereof (except by listing in_category() for every sub category ID)?

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