Easily add QR encoded data to any post using a simple mark-up.

WP-QREncoder

Allows post authors to easily add qrencoded images to their posts. Uses: QRcode Perl CGI & PHP scripts ver. 0.50: http://www.swetake.

Hiroaki Miyashita

The Barcode QRcode Generator plugin adds the functionality to output barcodes and qrcodes by use of the shortcodes [barcode] and [qrcode].
<h4>How to use [barcode]</h4>
In order to output barcodes, [barcode] will be used. There are some attributes for [barcode].
text … A text that should be in the image barcode.
type … The barcode type: code39, int25, ean13, upca, upce, code128, ean8, and postnet. Default: ean13
imgtype … The image type that will be generated: gif, jpg, and png. Default: png
height … The image height (px). Default: 60
width … The image width. Default: 1
showText … The text should be placed under barcode. Default: 1
rotation … The rotation angle. Default: 0
transparency … The transparent background. Default: 0
remake … The barcode will be regenerated every time. Default: 0
textfilename … The text value will be the file name. Default: 0
Ex) [barcode text=4930127000019 height=100 wdith=2 transparency=1]
<h4>How to use [qrcode]</h4>
In order to output qrcodes, [qrcode] will be used. There are some attributes for [qrcode].
text … A text that should be in the image qrcode.
eclevel … Error correction level. 0(Level L), 1(Level M), 2(Level Q), and 3(Level H) Default: 3
height … The image height (px). Default: 60
width … The image width (px). Default: 60
transparency … The transparent background. Default: 0
remake … The barcode will be regenerated every time. Default: 0
textfilename … The text value will be the file name. Default: 0
Ex) [qrcode text=4930127000019 height=100 width=100 transparency=1]
<h4>Documentation in Japanese</h4>
<a href="http://www.cmswp.jp/plugins/barcode_qrcode_generator/" rel="nofollow ugc">Barcode QRcode Generator</a>
<h3>Uninstall</h3>
<ol>
<li>Deactivate the plugin</li>
<li>That’s it! 🙂</li>
</ol>

Barcode QRcode Generator

This plugin adds the functionality to output barcodes and qrcodes by use of the shortcodes.

WP-QREncoder vs Barcode QRcode Generator