Select Primary Category

= When using the shortcode, do I need to use the primary category's ID, slug or name? You can use either of them. E.g. assuming a category with ID 3, slug 'ground-coffee' and name 'Ground Coffee'. the following shortcode definitions will all work: [posts_by_primary_category category="3"] [posts_by_primary_category category="ground-coffee"] [posts_by_primary_category category="Ground Coffee"] If you want to fetch posts belonging to a particular category (or, more generally, belonging to a particular term) you can use this: if ( class_exists( 'SPC_Queries' ) ) { / * Let's fetch 10 published posts with primary category set to category ID 2. / $spc_queries = SPC_Infrastructure_Container::get_instance()->get( 'SPC_Queries' ); $posts = $spc_queries->get_primary_term_posts( 2, array( 'post_status' => 'publish', 'posts_per_page' => 10, 'post_type' => 'post', ) ); } You can just as well pass a category slug or name, instead of its ID, if you prefer.