woocommerce - How do I get the most top level category of the current product category

I have a Woocommerce product and I need to display on that page the Most top level category of a category assigned to the product

- Main Product Category
-- Sub Product Category
--- Category Assigned to product

I need to get the ID or name of "Main Product Category" so that I can display it in the single product category.

I already tried doing the following:

global $post;
$terms = get_the_terms( $post->ID, 'product_cat' );

foreach ($terms as $term) {
$product_cat_id = $term->term_id;

$thetop_parent = woocommerce_get_term_top_most_parent( $product_cat_id , 'product_cat' );

echo $thetop_parent;

But It didn't worked at all and it brakes the page from loading after woocomerce_get_term... I'm not sure what to do at this point It

thanks for any help on this.


or maybe this:

$cat = get_the_terms( $product->ID, 'product_cat' );

foreach ($cat as $categoria) {
if($categoria->parent == 0){
   echo $categoria->name;

After a lot of research I figured a way to solve this. I hope this will help someone.


global $post;
$prod_terms = get_the_terms( $post->ID, 'product_cat' );
foreach ($prod_terms as $prod_term) {

    // gets product cat id
    $product_cat_id = $prod_term->term_id;

    // gets an array of all parent category levels
    $product_parent_categories_all_hierachy = get_ancestors( $product_cat_id, 'product_cat' );  

    // This cuts the array and extracts the last set in the array
    $last_parent_cat = array_slice($product_parent_categories_all_hierachy, -1, 1, true);
    foreach($last_parent_cat as $last_parent_cat_value){
        // $last_parent_cat_value is the id of the most top level category, can be use whichever one like
        echo '<strong>' . $last_parent_cat_value . '</strong>';


I know this is an old post, but I had a similar situation where we needed to get the root category of the current product being viewed. The simplest solution I could think of was to look at how WooCommerce does its breadcrumbs, and this piece of code is what did the trick for me:

if ( is_product() ) {
    global $post;
    $terms = wc_get_product_terms( $post->ID, 'product_cat', array( 'orderby' => 'parent', 'order' => 'DESC' ) );
    if ( ! empty( $terms ) ) {
        $main_term = $terms[0];
        $ancestors = get_ancestors( $main_term->term_id, 'product_cat' );
        if ( ! empty( $ancestors ) ) {
            $ancestors = array_reverse( $ancestors );
            // first element in $ancestors has the root category ID
            // get root category object
            $root_cat = get_term( $ancestors[0], 'product_cat' );
        else {
            // root category would be $main_term if no ancestors exist
    else {
        // no category assigned to the product

Here the solution i actually use

function get_parent_terms($term) {
    if ($term->parent > 0){
        $term = get_term_by("id", $term->parent, "product_cat");
        return get_parent_terms($term);
        return $term->term_id;
global $wp_query;
$cat_obj = $wp_query->get_queried_object();
$Root_Cat_ID = get_parent_terms($cat_obj);

Here if u have the a "category_ID"

/*If you dont have a category ID use this: 
*       $category_ID = get_queried_object()->term_id;
* This will get you the current category_ID 

$termid = get_term($category_ID, 'product_cat' );
    if($termid->parent > 0) 
    {                       // get the parent's hierarchy.
        $cat_hierachy = get_ancestors( $category_ID, 'product_cat' );  
        return end($cat_hierachy); // returns the Level-1 category_ID
    return $category_ID; // Has no parent so return THIS category_ID  Level-1

This is the function I've developed to use.

 * Get product's top category
 * @param int $pid. The product ID
 * @return int. Returns product categories parent ID
 function get_product_top_category($pid) {
    global $wpdb;
    $cat_id = $wpdb->get_var('SELECT b.term_id FROM '.$wpdb->prefix.'term_relationships a, '.$wpdb->prefix.'term_taxonomy b WHERE a.object_id = "'.$pid.'" AND a.term_taxonomy_id = b.term_taxonomy_id AND b.parent = "0" AND b.taxonomy = "product_cat" LIMIT 1');
    return $cat_id;

So you can fetch the top category of current product by using this

$top_level_term = get_product_top_category($post->ID);

A limitation of this code are that it could return multiple top level categories of any product. To combat that, I used LIMIT 1 to return only single category which suits fine for me.

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