QR codes (or 'Quick Response codes') are one of the most popular types of barcodes in use today, with the ability to encode up to 4296 characters. The QR code has become incredibly popular due to their fast readability and greater storage capacity compared to other types of barcodes.
Typical QR code applications include product tracking, item identification, time tracking, document management, general marketing, URLs and much more. It's also used for the tracking of physical items, such as mail and packages. Barcodes are now commonly used for tickets which are scanned to allow to access to events.
QR codes are widely used on websites where they generally represent the URL of the website. When someone wants to read the content of your web page on their mobile phone, they can scan the QR code and which opens the URL in a browser instead of manually typing a long URL.
There are several types of QR codes, Model 1, Micro, IQR, SQRC and LogoQ. Model 1 is the most common type of QR code type and it's the one we'll be using in our example.
In this tutorial, I'll show you how to create a plugin that adds a QR code to the end of every WordPress post that represents the full URL.
Continue reading %How to Add QR Codes to WordPress Posts%
by Narayan Prusty via SitePoint
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