Getting invoice info with Order ID

Hi! You don’t need to use WP_Query, the invoice number and date are stored as postmeta. So with the post_id, you can get the invoice data with get_post_meta().

$invoice_number = get_post_meta( $order_id, '_wcpdf_formatted_invoice_number', true );
$invoice_date = get_post_meta( $order_id, '_wcpdf_invoice_date', true );

There are also several built in functions that do this if the PDF invoice plugin is loaded (in the $wpo_wcpdf object):

$invoice_number = $wpo_wcpdf->get_invoice_number();
$invoice_date = $wpo_wcpdf->get_invoice_date();

But that only works in the context of the plugin (when it has loaded an order).

Hope that helps!
Ewout

Your welcome! If you can spare a minute, I would really appreciate if you can leave me a review here on wordpress.org 🙂

Thanks in advance and have a fantastic day!

Ewout