我已经研究了get_last_order（）WooCommerce函数，下面的自定义函数应该给予你倒数第二个订单对象：

function bbloomer_get_second_last_order( $customer ) {
    
    global $wpdb;

    $order_statuses_sql = "( '" . implode( "','", array_map( 'esc_sql', array_keys( wc_get_order_statuses() ) ) ) . "' )";

    $second_last_order_id = $wpdb->get_var(
        "SELECT posts.ID
        FROM $wpdb->posts AS posts
        LEFT JOIN {$wpdb->postmeta} AS meta on posts.ID = meta.post_id
        WHERE meta.meta_key = '_customer_user'
        AND meta.meta_value = '" . esc_sql( $customer->get_id() ) . "'
        AND posts.post_type = 'shop_order'
        AND posts.post_status IN $order_statuses_sql
        ORDER BY posts.ID DESC
        LIMIT 1 , 1"
    );

    if ( ! $second_last_order_id ) {
        return false;
    }

    return wc_get_order( absint( $second_last_order_id ) );

}

然后，您可以使用get anything related to the WooCommerce order object的输出，如ID或日期，例如：

if ( bbloomer_get_second_last_order( $customer ) ) {
   $second_last_order_date = wc_format_datetime( bbloomer_get_second_last_order( $customer )->get_date_created() );
} else $second_last_order_date = '';

请注意，$customer是客户对象，因此如果您有权访问客户ID，则需要在将其传递给bbloomer_get_second_last_order（）之前，通过以下方式创建客户对象：

$customer = new WC_Customer( $customer_id );