Pobieranie liczby produktów WooCommerce - Krok 1

add_action('wp_ajax_nopriv_get_cart_totals', 'get_cart_totals_callback');

function get_cart_totals_callback() {

    global $woocommerce;

    echo json_encode(array(
        'cart_count' => $woocommerce->cart->cart_contents_count
    ));

    wp_die();

}