To change the WooCommerce order number to include leading zeros, add the following code to the
functions.php file in the theme folder you use on your installation. To change the number of leading zeros, modify the variable
If you do not use the child theme, remember that changes made to the
functions.php file will be overwritten when the theme is updated.
While copying code to
functions.php file it is not nessesary to copy
<?php opening tag.