VB 3.x Thread: http://www.vbulletin.org/forum/misc.php?do=producthelp&pid=qrpagesbop5vb3 OR
http://www.qapla.com/mods/showthread.php/103-Basic-QR-Intergraton-(2D-Barcodes)-for-VB-Threads-(QR-Pages-by-BOP5)

VB 4.x Thread: http://www.vbulletin.org/forum/misc.php?do=producthelp&pid=qrpagesbop5vb4 (Coming Soon)

Product: QR Pages (for threads) for VB3 by BOP5

Developer: BirdOPrey5 on vBulletin.org
Developer Website: www.qapla.com - Visit Qappla.com for more vBulletin mods!

Profile URL: http://www.vbulletin.org/forum/member.php?u=258922

Version 1.0

!!!!!!UNSPPORTED MOD!!!!!!
I will not be supporting this mod on vBulletin.org because this is not a truly finished mod. I am releasing this in hopes someone with better design experience than me will be able to find a way to nicely intergrate this into a vBulletin page. I was more concerned in putting code together to generate the actual QR Codes then to actally display them on showthread.php. 

As I work on this updates and discussion will take place on Qapla.com first:
http://www.qapla.com/mods/showthread.php/103-Basic-QR-Intergraton-(2D-Barcodes)-for-VB-Threads-(QR-Pages-by-BOP5)

QR Generation is done via a free open-source project included under its own GPL license:
http://phpqrcode.sourceforge.net/

*****IMPORTANT******
You should always BACKUP your Database before installing a new mod. I have tested this but can't be responsible if something goes wrong. This is provided AS IS, USE AT YOUR OWN RISK. I will provide support as I am able. 
ort forum.

To Install: 
Upload all folders in the UPLOAD directory to your forum root
Make sure the folder /images/qr is writable to your web server. (chmod 755 usually. If errors try 777)
You may want to delete the folder /phpqrcode/ORIGINAL FILES/ - These were files included with the phpqrcode project but aren't needed to run the mod.
In Admin CP go to Plugins & Products -> Manage Products -> Add/Import Product
Click on "Choose File" and browse to the product xml file that was packaged in the .zip file.
Click "Import"

To Upgrade:
In Admin CP go to Plugins & Products -> Manage Products -> Add/Import Product
Click on "Choose File" and browse to the product xml file that was packaged in the .zip file.
Change "Allow Overwrite" to YES
Click "Import"

After the product has been imported:

You must edit your SHOWTHREAD template.

Simply add the line:
$bop_qr

Anywhere in the template to display the QR Code.

If you want to set it up like in my screenshot find the line:
<!-- / controls above postbits -->

And directly below that add:

<if condition="$vboptions[bop5qr_en]">
<div id="bop5qr_box" align="right" style="position:relative;">
 <strong>QR CODE</strong> <br />
  $bop_qr
</div>

<style type="text/css">
#bop5qr_box {
  overflow: hidden;
  height: 16px;
  z-index: 1000;
  background: #a0a0a0;
}

#bop5qr_box:hover {
  overflow: visible;
}
</style>
</if>


This will display a basic bar across the page and when the user hovers AKA mouse-overs the bar the full QR Code will become visible.

Finally, go to vBulletin Options -> QR Pages by BOP5 (near the bottom) 
You MUST enable the mod before it will work. It is turned OFF by default. 

Set your options before you enable!


This has been tested and working on vBulletin 3.8.7. I expect it will worl on all 3.x versions above 3.5 or 3.6.