QR Code plugin
It display a QR code with the URL of the item. Useful to quick share items with other people, print it and place anywhere.
In order to work, you will need to place the following lines whereever you want to display the QR. The QR code will be placed inside a tag at that place.
<?php show_qrcode(); ?>
It is also important that you have the GD extension enabled in your server.