我有一个代码，在分类页面上显示来自相同类别的随机帖子。我使用子类别和父类别，我只想显示来自同一子类别或同一父类别的帖子。目前，代码在子类别页面上同时显示（来自父类别和子类别的帖子）。我没有找到解决这个问题的方法。我试过了

get_terms( array(\'parent\' => 0 ) ); 

/*recent posts*/
function my_posts_from_category( $atts, $content = null ) {
    extract(shortcode_atts(array(
        \'count\' => 5,
        \'verbose\' => \'0\'    // \'1\' outputs some debug info
    ), $atts));
    $verbose = ( $verbose !== \'0\' );

    $content = \'\';

    $current_categories = array();
    global $post;
    if ( !empty( $post ) ) {
        // get all categories of current post
        $terms = get_the_terms( $post->ID, \'category\', \'orderby=count&hide_empty=0&parent=0\');
        if ( $terms && !is_wp_error( $terms ) ) {
            foreach( $terms as $term ) {
                /*if ($_term->parent == 0) //check for parent terms only*/
                $current_categories[] = $term;
            }
        }
    } else {
        if ( $verbose ) $content = \'posts_from_category: no $post...\';
    }

    foreach ( $current_categories as $category ) {

        // get all tags of current post
        $found_terms = array();
        $terms = get_the_terms( $post->ID, \'post_tag\' );
        if ( !is_wp_error( $terms ) && !empty( $terms ) ) {
            foreach ( $terms as $term ) {
                $found_terms[] = $term->term_id;
            }
        }

        // list of ids to exclude, first entry: current post
        $my_exclude_ids = array( $post->ID );

        // ids of related posts of current post
        $my_related_post_ids = array();

        foreach ( $found_terms as $found_term ) {
            // get one post with found tag ordered by random
            $args = array(
                \'posts_per_page\' => 1,
                \'orderby\' => \'rand\',
                \'tax_query\' => array(
                    array(
                        \'taxonomy\' => \'post_tag\',
                        \'field\' => \'id\',
                        \'terms\' => $found_term
                    )
                ),
                \'suppress_filters\' => false,
                \'fields\' => \'ids\',
                \'post__not_in\' => $my_exclude_ids   // exclude already found posts
            );
            $my_related_post_id = get_posts( $args );   // actually max. 1 post
            if ( !empty( $my_related_post_id ) ) {
                $my_related_post_ids = array_merge( $my_related_post_ids, $my_related_post_id );
                $my_exclude_ids = array_merge( $my_exclude_ids, $my_related_post_id );
            }
        }

        // get all post ids of current category ordered by date
        $args = array(
            \'posts_per_page\' => -1,
            \'orderby\' => \'post_date\',
            \'order\' => \'DESC\',
            \'tax_query\' => array(
                array(
                    \'taxonomy\' => \'category\',
                    \'field\' => \'id\',
                    \'terms\' => $category->term_id
                )
            ),
            \'suppress_filters\' => false,
            \'fields\' => \'ids\',
            \'post__not_in\' => $my_exclude_ids   // exclude current post
        );
        $my_post_ids = get_posts( $args );
        // result could be empty if all found were also related before

        // combine results
        $my_post_ids = array_merge( $my_post_ids, $my_related_post_ids );

        // mix results in random order, todo, array_splice(len=0)?
        shuffle( $my_post_ids );

        $posts_lis = array();
        foreach ( $my_post_ids as $my_post_id ) {
            // add a post
            $posts_lis[ \'id_\' . $my_post_id ] = \'<li><a href="\' . get_permalink( $my_post_id ) . \'" title="\' . esc_attr( get_the_title($my_post_id ) ) . \'">\' . get_the_title($my_post_id ) . \'</a> (\' . get_the_date( get_option( \'date_format\' ), $my_post_id ) . \')</li>\';
            // limit output
            if ( count( $posts_lis ) >= $count ) {
                break;
            }
        }

        // build html container
        $content .= \'<div class="posts-from-category posts-from-category-\' . $category->slug . \'">\';
        $content .= \'<p>Bei Lesern der Kategorie <a href="\' . esc_url( get_term_link( $category->slug, \'category\' ) ) . \'">\' . $category->name . \'</a> ebenfalls beliebt:</p>\';
        $content .= \'<ul>\';
        $content .= implode( $posts_lis );
        $content .= \'</ul>\';
        $content .= \'</div>\';
    }
    return $content;
}