[wp-hackers] Plugin License Excluding Spam

Jennifer Hodgdon yahgrp at poplarware.com
Fri Oct 23 15:36:35 UTC 2009

Otto wrote:
> - WordPress is licensed under the GPLv2. The GPLv3 is not compatible,
> because of the additional restrictions it imposes. There's no code or
> documentation I'm aware of that allows you to up-version with
> WordPress and the license, so AFAICT, the GPLv3 is not an acceptable
> license for WordPress plugins and/or themes.

I think you are wrong there. The readme.html file in the WordPress 
distro says:

"WordPress is released under the GPL (see license.txt)."

license.txt says:

"If the Program does not specify a version number of this License, you 
may choose any version ever published by the Free Software Foundation."

WordPress does not specify a version number (except I do see a GPL v2 
reference in xmlrpc.php, and there are specific licenses on some 
individual 3rd-party files that are included in WordPress), as far as 
I can see.

So you may choose any version of the GPL, by my reading. I'm not an 


Jennifer Hodgdon * Poplar ProductivityWare
Drupal, WordPress, and custom Web programming

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