invoice number vs invoice order

I don’t know of a plugin with such functionality, WooCommerce Sequential Order Numbers is good, but it also counts cancelled orders (note that the order number is not the same as the WooCommerce order ID!).

Technically, at least in a lot of european countries, you have to keep the invoice for the cancelled order and create a credit note (which at least in the Netherlands can have a separate numbering system!).

I understand that everyone’s needs are different, so I added a sequential invoice number functionality. I’ll release it as beta first, I’d like to know what you think. You can download this development version here:

http://downloads.wordpress.org/plugin/woocommerce-pdf-invoices-packing-slips.zip

The invoice numbers start numbering from the first order_id you create an invoice for, to prevent confusion.

you can call the invoice number with the following code in your template:

?php $wpo_wcpdf->invoice_number(); ?>

if you want to add a prefix or reduce the count, add 10000 etc, you can filter the invoice value with the following code in your functions.php (modify to your liking):

add_filter( 'wpo_wcpdf_invoice_number', 'wpo_wcpdf_invoice_number' );
function wpo_wcpdf_invoice_number($invoice_number) {
	$prefix = 'ABC';
	$current_year = date("Y");
	$offset = 10000;
	$invoice_number = $prefix . $current_year . ($offset + $invoice_number);
	return $invoice_number;
}

whoops, noticed that there was a < missing in the first code snippet!!!!

<?php $wpo_wcpdf->invoice_number(); ?>

I will not make the invoice number implemented as a default setting, but I will consider putting it on the settings page, so people can choose. Some people use the Sequential Order Number plugin already, and if it then uses an even different number it gets messy/confusing.

Allright, a little present for you :o)
If you checkout the latest development version, it contains two new settings in the template settings pane:

• Number to display on invoice (order number or invoice number)
• Date to display on invoice (order date or invoice date)

Let me know what you think!

You have downloaded the release version, you need the development version!
http://downloads.wordpress.org/plugin/woocommerce-pdf-invoices-packing-slips.zip

(which you can also find under:
http://wordpress.org/plugins/woocommerce-pdf-invoices-packing-slips/developers/

I’m not sure I understand. If you go to the template settings panel and set it to:
“Built in sequential invoice number”
and:
“Invoice date”

does that not work for you? Are you using the default simple template?

1.2.0 is now released! I included the invoice number filter suggestion in the FAQ too:

add_filter( 'wpo_wcpdf_invoice_number', 'wpo_wcpdf_invoice_number', 10, 4 );

function wpo_wcpdf_invoice_number( $invoice_number, $order_number, $order_id, $order_date ) {
	$prefix = 'ABC';
	$order_year = date_i18n( 'Y', strtotime( $order_date ) );
	$offset = 10000;
	$invoice_number = $prefix . $order_year . ($offset + $invoice_number);
	return $invoice_number;
}

Off course you can add a suffix, do whatever. You can use the order number, order id and order date to create additional strings, the order_id even allows you to access all order data directly (although I recommend to minimize this to save memory).