这个get_category_parents 是一个检索作为参数传递的父类别的函数category id.

因此，如果您有一个产品，并且希望检索附加类别的列表，那么正确的功能是get_the_terms.该函数返回所有categories对象，没有顺序，因此您可以获取这些类别中的第一个并调用get_category_parents.

假设$product 变量包含post对象，可以使用

$cats = get_the_terms( $product->ID, \'product_cat\' );
echo $cats ? get_category_parents( array_shift($cats)->term_id ) : \'\';

下面的代码应该做你想做的事情，它有工作的好处product 和product category 环境。此外，它还内置了一些选项，如下所述how to use.

代码

function wc_origin_trail_ancestor( $link = false, $trail = false ) {

    if (is_product_category()) {
        global $wp_query;
        $q_obj = $wp_query->get_queried_object();
        $cat_id = $q_obj->term_id;

        $descendant = get_term_by("id", $cat_id, "product_cat");
        $descendant_id = $descendant->term_id;

        $ancestors = get_ancestors($cat_id, \'product_cat\');
        $ancestors = array_reverse($ancestors);

        $origin_ancestor = get_term_by("id", $ancestors[0], "product_cat");
        $origin_ancestor_id = $origin_ancestor->term_id;

        $ac = count($ancestors);

    } else if ( is_product() ) {

        $descendant = get_the_terms( $post->ID, \'product_cat\' );
        $descendant = array_reverse($descendant);
        $descendant = $descendant[0];
        $descendant_id = $descendant->term_id;

        $ancestors = array_reverse(get_ancestors($descendant_id, \'product_cat\'));
        $ac = count($ancestors);

    }


    $c = 1;
    if( $trail == false ){

        $origin_ancestor_term = get_term_by("id", $ancestors[0], "product_cat");
        $origin_ancestor_link = get_term_link( $origin_ancestor_term->slug, $origin_ancestor_term->taxonomy );

        if($link == true) 
            echo \'<a href="\'. $origin_ancestor_link .\'">\';
        echo $origin_ancestor_term->name;
        if($link == true) 
            echo \'</a>\';

    }else{

        foreach ($ancestors as $ancestor) {
            $ancestor_term = get_term_by("id", $ancestor, "product_cat");
            $ancestor_link = get_term_link( $ancestor_term->slug, $ancestor_term->taxonomy );

            if($c++ == 1) 
                echo \'» \'; 
            else if($c++ != 1 || $c++ != $ac) 
                echo \' » \';

            if($link == true) 
                echo \'<a href="\'. $ancestor_link .\'">\';
            echo  $ancestor_term->name;
            if($link == true) 
                echo \'</a>\';

        }

        $descendant_term = get_term_by("id", $descendant_id, "product_cat");
        $descendant_link = get_term_link( $descendant_term->slug, $descendant_term->taxonomy );

        echo \' » \';
        if($link == true) 
            echo \'<a href="\'. $descendant_link .\'">\';
        echo $descendant->name;
        if($link == true) 
            echo \'</a>\';

    }

}

注释将不起作用