https://drive.google.com/open?id=0B3TWIbBcUUTwcE1vV24wQnRxNGs
above is the link of js file include it in your project and write the below code in ctp file in cake php or any where you want to use. i tested it in cake php...
<-- including the file....
Html->script('jquery.qrcode.min.js')?>
