Quick little snippet that will let you add a static PDF file (or in fact, any kind of file) to the WooCommerce Order Emails.
Just add the following code to the ‘custom functions’ area of your functions.php file:
Delete the php first line if you are having errors come up after saving the file.
Now simply edit the
$your_pdf_path variable to be wherever your PDF (or other file) is located!
Too easy, right?