How to create QR codes in WordPress to enhance the website user’s experience?

Today, the number of Internet users who access websites with smart phones has growing. QR code is another way to improve the user experience through careful use of mobile users. This article discusses a few topics, such as creating a QR code with the Google Chart and the GoQR API, add QR permalink meta box to managed post and page screens (such as creating a meta box), How to add a QR code website link to the dashboard (such as creating a dashboard widget) and how to create a short codes.