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WP_Query Class WordPress Developer Resources

    https://developer.wordpress.org/reference/classes/wp_query/
    Top ↑ Category Parameters # Category Parameters. Show posts associated with certain categories. cat (int) – use category id.; category_name (string) – use category slug.; category__and (array) – use category id.; category__in (array) – use category id.; category__not_in (array) – use category id.; Display posts that have one category (and any children of that category), using ...

get_posts() Function WordPress Developer Resources

    https://developer.wordpress.org/reference/functions/get_posts/
    Top ↑ More Information # More Information. The most appropriate use for get_posts is to create an array of posts based on a set of parameters. It retrieves a list of recent posts or posts matching this criteria. get_posts can also be used to create Multiple Loops, though a more direct reference to WP_Query using new WP_Query is preferred in this case. ...

get_categories() Function WordPress Developer Resources

    https://developer.wordpress.org/reference/functions/get_categories/
    Function only returns categories in use by posts. It is very important to note that by default, the get_category() will ONLY return categories that ARE IN USE. This means if no post is assigned to the category, then the category object for that category is not returned.

wp_insert_category() Function WordPress Developer ...

    https://developer.wordpress.org/reference/functions/wp_insert_category/
    To insert a new category: //Define the category $wpdocs_cat = array('cat_name' => 'Wpdocs Category', 'category_description' => 'A Cool Category', 'category_nicename' => 'category-slug', 'category_parent' => ''); // Create the category $wpdocs_cat_id = wp_insert_category($wpdocs_cat);
    [CATITEMSBL#1]

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