Cristina:Only show products from within the current category.

Cristina:Only show products from within the current category.

//Christina's function for showing ONLY related items in the SAME category//
// Christina, drop this into your CHILD functions.php file //
function get_related_custom( $id, $limit = 5 ) {
    global $woocommerce;
    
    $cats_array = array(0);

    $terms = wp_get_post_terms($id, 'product_cat');
    foreach ( $terms as $term ) $cats_array[] = $term->term_id;

    // Don't bother if none are set //
    if ( sizeof($cats_array)==1 ) return array();

    
    $meta_query = array();
    $meta_query[] = $woocommerce->query->visibility_meta_query();
    $meta_query[] = $woocommerce->query->stock_status_meta_query();

    
    $related_posts = get_posts( apply_filters('woocommerce_product_related_posts', array(
        'orderby'        => 'rand',
        'posts_per_page' => $limit,
        'post_type'      => 'product',
        'fields'         => 'ids',
        'meta_query'     => $meta_query,
        'tax_query'      => array(
            'relation'      => 'OR',
            array(
                'taxonomy'     => 'product_cat',
                'field'        => 'id',
                'terms'        => $cats_array
            ),
          )
    ) ) );
    $related_posts = array_diff( $related_posts, array( $id ));
    return $related_posts;
}
add_action('init','get_related_custom');

It works? On this hook (init)?

I saw such a decision, but it does not work unfortunately in version 2.6 ... https://wordpress.org/support/topic/related-products-filter#post-4087744