WordPress调用指定分类目录下的TAG标签
来源:千越SEO 浏览:126在网站优化过程中可能会需要对已有栏目、页面进行优化调整,比较常见的一种就是“内容聚合”,通过TAG页面来集中某一类型的内容,有时也需要用TAG页面做长尾关键词的优化,所以把某一个栏目下的TAG集中到一起也是很有必要的。
本文主要介绍wordpress如何调用某一分类下的TAG,例如,获取“栏目一”下的所有TAG标签。
1、在functions.php文件中添加以下函数(一般添加到PHP结束标签之前就可以了):
function ludou_get_category_tags($args) { global $wpdb; $tags = $wpdb->get_results (" SELECT DISTINCT terms2.term_id as tag_id, terms2.name as tag_name 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 $wpdb->terms as terms2 ON t2.term_id = terms2.term_id WHERE t1.taxonomy = 'category' AND p1.post_status = 'publish' AND terms1.term_id IN (".$args['categories'].") AND t2.taxonomy = 'post_tag' AND p2.post_status = 'publish' AND p1.ID = p2.ID ORDER by tag_name "); $count = 0; if($tags) { foreach ($tags as $tag) { $mytag[$count] = get_term_by('id', $tag->tag_id, 'post_tag'); $count++; } } else { $mytag = NULL; } return $mytag; }
2、在需要调用的地方,使用以下代码即可:
<? php // 1,2是分类ID,多个用半角逗号隔开 $args = array( 'categories' => '1,2'); $tags = ludou_get_category_tags($args); // 以列表形式输出 $content .= "<ul>"; if(!empty($tags)) { foreach ($tags as $tag) { $content .= "<li><a href='".get_tag_link($tag->term_id)."'>".$tag->name."</a></li>"; } } $content .= "</ul>"; echo $content; ?>