custom php

//Register taxonomy API for WC
add_action( 'rest_api_init', 'register_rest_field_for_custom_taxonomy_brands' );
function register_rest_field_for_custom_taxonomy_brands() {


    register_rest_field('product', "marca", array(
        'get_callback'    => 'product_get_callback',
        'update_callback'    => 'product_update_callback',
        'schema' => null,
    ));

}
        //Get Taxonomy record in wc REST API
         function product_get_callback($post, $attr, $request, $object_type)
        {
            $terms = array();

            // Get terms
            foreach (wp_get_post_terms( $post[ 'id' ],'marca') as $term) {
                $terms[] = array(
                    'id'        => $term->term_id,
                    'name'      => $term->name,
                    'slug'      => $term->slug
                );
            }

            return $terms;
        }

         //Update Taxonomy record in wc REST API
         function product_update_callback($values, $post, $attr, $request, $object_type)
        {
            // Post ID
            $postId = $post->ID();

            //Example: $values = [2,4,3];

            // Set terms
           wp_set_object_terms( $postId, $values , 'marca');


        }