php Возвращаетданныеометкахпостов，входящихвуказанную（ые）рубрику（и）

Posted 2021-05-05

<?php
/**
 * Возвращает данные о метках постов, входящих в указанную(ые) рубрику(и)
 *
 * @param array|string $ids массив id рубрик(и) или строка с перечислением id через запятую
 *
 * @return array|bool $tags массив с метками или false в случае неудачи
 */
function get_category_tags( $ids ) {
	global $wpdb;
	$ids = is_array( $ids ) ? implode( ",", $ids ) : $ids;
	
	// Запрос в БД на основе $ids
	$tags = $wpdb->get_results
	( "
		SELECT DISTINCT terms2.term_id as tag_id, terms2.name as tag_name, null as tag_link
		FROM
			$wpdb->posts as p1
			LEFT JOIN wp_term_relationships as r1 ON p1.ID = r1.object_ID
			LEFT JOIN wp_term_taxonomy as t1 ON r1.term_taxonomy_id = t1.term_taxonomy_id
			LEFT JOIN wp_terms as terms1 ON t1.term_id = terms1.term_id,

			$wpdb->posts as p2
			LEFT JOIN wp_term_relationships as r2 ON p2.ID = r2.object_ID
			LEFT JOIN wp_term_taxonomy as t2 ON r2.term_taxonomy_id = t2.term_taxonomy_id
			LEFT JOIN wp_terms as terms2 ON t2.term_id = terms2.term_id
		WHERE
			t1.taxonomy = 'category' AND p1.post_status = 'publish' AND terms1.term_id IN (" . $ids . ") AND
			t2.taxonomy = 'post_tag' AND p2.post_status = 'publish'
			AND p1.ID = p2.ID
		ORDER by tag_name
	" );
	
	// Если есть результаты, то добавляем в массив ссылки на теги
	if ( $tags ) {
		$count = 0;
		foreach ( $tags as $tag ) {
			$tags[ $count ]->tag_link = get_tag_link( $tag->tag_id );
			$count ++;
		}
	} else {
		$tags = false;
	}
	
	return $tags;
}