vkt005

Use Wa QRcode as shortcode in post content or widget area without editing your theme files
USAGE: Use [qrcode] 
OR 
[qrcode content=”Put your content for QR code” size=”80″ alt=”ALT_TEXT” class=”classname”]
shortcode in your post content to show the QR Code without editing your theme files
EXAMPLE: [qrcode] it will qr code of current page url 
OR 
[qrcode content=”Put your content for QR code” size=”80″ alt=”ALT_TEXT” class=”classname”]
size = Size is given for the size of QR Code it should be in Pixel
alt = tool tip on Generated QR code => Default Value “Scan the QR Code”
Classname = it will user defined class to Captcha for better css controll
Shadow = true
OR
Place below function in your theme file where you want to display QR code.
 ‘your custom content’,’size’=>75)) 
?> 
OR
By using QR code button in Editor

Wa Qrcode

Use Wa QRcode generate to put QR code to you post, page or content area or widget area without editing your theme files

holyhope

QRCodes is a plugin very usefull, when visitor print pages, it add qrcodes which redirect to the current url. So people who read your posts (and pages) can find easily your website.
It automatically generate qrcode for wordpress posts and pages (they are cached so your site will still be as fast as before you install this plugin). 
Moreove, it add qrcodes on the go to all other visited pages.
Help your visitor and everyone to find and reach your website.
<h3>Planned works</h3>
<ul>
<li>Add help tab to admin pages.</li>
<li>Translate plugin.</li>
<li>Add setting qrcode zoomable and movable in the option page.</li>
<li>Set FAQ in readme.txt.</li>
<li>Add a banner for <a href="http://wordpress.org" rel="ugc">wordpress.org</a>.</li>
</ul>

QRCodes

QRCodes add images that visitor can flash with their favorites applications. Choose where to display and when (ex: only on printed page).

Wa Qrcode vs QRCodes