WC_Post_types::register_post_status PHP Method

    public static function register_post_status()
    {
        $order_statuses = apply_filters('woocommerce_register_shop_order_post_statuses', array('wc-pending' => array('label' => _x('Pending payment', 'Order status', 'woocommerce'), 'public' => false, 'exclude_from_search' => false, 'show_in_admin_all_list' => true, 'show_in_admin_status_list' => true, 'label_count' => _n_noop('Pending payment <span class="count">(%s)</span>', 'Pending payment <span class="count">(%s)</span>', 'woocommerce')), 'wc-processing' => array('label' => _x('Processing', 'Order status', 'woocommerce'), 'public' => false, 'exclude_from_search' => false, 'show_in_admin_all_list' => true, 'show_in_admin_status_list' => true, 'label_count' => _n_noop('Processing <span class="count">(%s)</span>', 'Processing <span class="count">(%s)</span>', 'woocommerce')), 'wc-on-hold' => array('label' => _x('On hold', 'Order status', 'woocommerce'), 'public' => false, 'exclude_from_search' => false, 'show_in_admin_all_list' => true, 'show_in_admin_status_list' => true, 'label_count' => _n_noop('On hold <span class="count">(%s)</span>', 'On hold <span class="count">(%s)</span>', 'woocommerce')), 'wc-completed' => array('label' => _x('Completed', 'Order status', 'woocommerce'), 'public' => false, 'exclude_from_search' => false, 'show_in_admin_all_list' => true, 'show_in_admin_status_list' => true, 'label_count' => _n_noop('Completed <span class="count">(%s)</span>', 'Completed <span class="count">(%s)</span>', 'woocommerce')), 'wc-cancelled' => array('label' => _x('Cancelled', 'Order status', 'woocommerce'), 'public' => false, 'exclude_from_search' => false, 'show_in_admin_all_list' => true, 'show_in_admin_status_list' => true, 'label_count' => _n_noop('Cancelled <span class="count">(%s)</span>', 'Cancelled <span class="count">(%s)</span>', 'woocommerce')), 'wc-refunded' => array('label' => _x('Refunded', 'Order status', 'woocommerce'), 'public' => false, 'exclude_from_search' => false, 'show_in_admin_all_list' => true, 'show_in_admin_status_list' => true, 'label_count' => _n_noop('Refunded <span class="count">(%s)</span>', 'Refunded <span class="count">(%s)</span>', 'woocommerce')), 'wc-failed' => array('label' => _x('Failed', 'Order status', 'woocommerce'), 'public' => false, 'exclude_from_search' => false, 'show_in_admin_all_list' => true, 'show_in_admin_status_list' => true, 'label_count' => _n_noop('Failed <span class="count">(%s)</span>', 'Failed <span class="count">(%s)</span>', 'woocommerce'))));
        foreach ($order_statuses as $order_status => $values) {
            register_post_status($order_status, $values);
        }
    }