wordpress不同栏目如何分别调用相关tag标签

WordPress 标签标签其实非常强大。我们可以在分类栏目页面调用当前分类文章中添加的所有标签，方便用户检索自己喜欢的内容，提升用户体验，方便网站seo优化。

wordpress的不同列如何分别调用相关的标签标签？

首先，向主题functions.php模板文件添加以下功能:

function 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;
}

其次，将下面调用输出代码，添加到主题 category.php 模板适当位置：

<?php
    $cat= single_cat_title('', false);
    $args = array( 'categories' => get_cat_ID($cat));
    $tags = get_category_tags($args);
    $content .= "<ul class='cat-tag'>";
    if(!empty($tags)) {
        foreach ($tags as $tag) {
            $content .= "<li><a href=\"".get_tag_link($tag->term_id)."\">".$tag->name."</a></li>";
        }
    }
    $content .= "</ul>";
    echo $content;
?>

最后，再适当加上样式即可：

.cat-tag{
    float: left;
    width: 100%;
}
.cat-tag li a{
    float: left;
    margin: 0 5px;
}

懂css的同学可以调整自己的风格，达到想要的显示效果！

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