Where is the documentation for cart_details->meta field

Some information can be found here:
https://wpinvoicing.com/support/topic/what-is-the-use-of-item-meta-on-cart_details/#post-4083

If you have more questions let us know.

Can you describe what you are trying to do?

We don’t do customizations here in the forum, but, if we can help you find the filter or hook for your goal, we can advise about that.

Hi Ali,

Currently, there is no way of adding a custom description for each item in the invoice. Here is an array of allowed arguments.

array(
   'quantity'      => 1,
   'id'            => false, // Required
   'name'          => '', // Defaults to the item's name but can be used to specify a different name
   'custom_price'  => '',
   'discount'      => 0,
   'tax'           => 0.00,
   'meta'          => array(),
   'fees'          => array()
);

The only way to accomplish what you are trying is by specifying your custom description in the item’s meta. You can then hook into the

wpinv_print_invoice_line_item_summary

and replace the item’s excerpt with your custom description.

See the following line to learn more about the hook:- https://github.com/AyeCode/invoicing/blob/039be99f715f751bbd253dbf0e77dc4cc8a5e2de/includes/wpinv-template-functions.php#L1059