前面介绍的《WordPress获取某分类下文章使用过的标签》满足了获取分类关联标签的需求,现在反过来要获取标签关联的分类怎么办?既然可以通过分类获取关联标签,那么也可以通过标签获取关键的分类。通过对前面的函数代码进行简单的修改就可以实现该功能效果。
functions.php文件代码:
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<?php function ludou_get_tag_categories($args) { global $wpdb; $categories = $wpdb->get_results (" SELECT DISTINCT terms1.term_id as cat_id FROM $wpdb->posts as p1 LEFT JOIN $wpdb->term_relationships as r1 ON p1.ID = r1.object_ID LEFT JOIN $wpdb->term_taxonomy as t1 ON r1.term_taxonomy_id = t1.term_taxonomy_id LEFT JOIN $wpdb->terms as terms1 ON t1.term_id = terms1.term_id, $wpdb->posts as p2 LEFT JOIN $wpdb->term_relationships as r2 ON p2.ID = r2.object_ID LEFT JOIN $wpdb->term_taxonomy as t2 ON r2.term_taxonomy_id = t2.term_taxonomy_id LEFT JOIN $wpdb->terms as terms2 ON t2.term_id = terms2.term_id WHERE t1.taxonomy = 'category' AND p1.post_status = 'publish' AND terms2.term_id IN (".$args['tags'].") AND t2.taxonomy = 'post_tag' AND p2.post_status = 'publish' AND p1.ID = p2.ID ORDER by cat_id "); $count = 0; if($categories) { foreach ($categories as $category) { $mycategory[$count] = get_term_by('id', $category->cat_id, 'category'); $count++; } } else { $mycategory = NULL; } return $mycategory; } ?> |
调用代码:
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<?php // 12,13是标签ID,多个用半角逗号隔开 $args = array( 'tags' => '12,13'); // 调用上面定义的函数,来获取ID为12,13的标签的关联分类 $categories = ludou_get_tag_categories($args); // 输出我们获取到的关联分类,以列表形式打印 $content .= "<ul>"; if(!empty($categories)) { foreach ($categories as $category) { $content .= "<li><a href=/"".get_category_link( $category->term_id )."/">".$category->name."</a></li>"; } } $content .= "</ul>"; echo $content; ?> |
代码来自:露兜博客
原创文章,作者:bd101bd101,如若转载,请注明出处:https://blog.ytso.com/tech/wp/247983.html