Update your sources.list apt, in my case. I using debian 8 with nginx and yii2 is my php framework.
add this source code like this following below if you are using Jessie :
Using your console, update your repository like below :
Create QRCODE dynamic is so simple with link to http://sintret.com/qrcode. You just need add src attribute in your img tag like this following code :
<img src="http://sintret.com/qrcode" />
Property for this QrCode :