最下级分类显示它的上一级的所有同级分类缩略图+名称

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// 在产品分类页产品列表前，显示子分类（如果有），否则显示上一级分类的所有同级分类
add_action( ‘woocommerce_before_shop_loop’, ‘cc_display_category_box’, 5 );
function cc_display_category_box() {
if ( ! is_product_category() ) return; // 仅在产品分类页生效

$current_cat = get_queried_object();
if ( ! $current_cat || empty( $current_cat->term_id ) ) return;

// 1. 获取当前分类的子分类
$subcats = get_terms( array(
‘taxonomy’ => ‘product_cat’,
‘parent’ => $current_cat->term_id,
‘hide_empty’ => true,
‘orderby’ => ‘menu_order’,
‘order’ => ‘ASC’,
) );

if ( ! empty( $subcats ) && ! is_wp_error( $subcats ) ) {
// 👉 当前分类有子分类 → 显示子分类缩略图
echo ‘

    • ‘;
    • foreach ( $subcats as $cat ) {
    • $thumb_id = get_term_meta( $cat->term_id, ‘thumbnail_id’, true );
    • $thumb_url = $thumb_id ? wp_get_attachment_image_url( $thumb_id, ‘thumbnail’ ) : wc_placeholder_img_src();
    • $link = get_term_link( $cat );

echo ‘

‘;
}
echo ‘

‘;
} else {
// 👉 当前分类没有子分类 → 显示它上一级分类的所有子分类（即同级分类们）
if ( $current_cat->parent ) {
$siblings = get_terms( array(
‘taxonomy’ => ‘product_cat’,
‘parent’ => $current_cat->parent,
‘hide_empty’ => true,
‘orderby’ => ‘menu_order’,
‘order’ => ‘ASC’,
) );

if ( ! empty( $siblings ) && ! is_wp_error( $siblings ) ) {
echo ‘

    • ‘;
    • foreach ( $siblings as $cat ) {
    • $thumb_id = get_term_meta( $cat->term_id, ‘thumbnail_id’, true );
    • $thumb_url = $thumb_id ? wp_get_attachment_image_url( $thumb_id, ‘thumbnail’ ) : wc_placeholder_img_src();
    • $link = get_term_link( $cat );

echo ‘

‘;
}
echo ‘

‘;
}
}
}
}