Re: Clarification regarding PHP License and DFSG status

[Nathanael Nerode <neroden@twcny.rr.com>]

Francesco Poli wrote:

>>      The Zend Engine is licensed to the
>>      PHP Association (pursuant to a grant from Zend that can be
>>      found at http://www.php.net/license/ZendGrant/) for
>>      distribution to you under this license agreement, only as a
>>      part of PHP.  In the event that you separate the Zend Engine
>>      (or any portion thereof) from the rest of the software, or
>>      modify the Zend Engine, or any portion thereof, your use of the
>>      separated or modified Zend Engine software shall not be governed
>>      by this license, and instead shall be governed by the license
>>      set forth at http://www.zend.com/license/ZendLicense/.
> 
> This fails DFSG#3, as I'm not able to extract and/or modify the Zend
> Engine, thus creating a derivative work of PHP+Zend and distribute the
> result under the same terms as the license of the original software.
Everything else Francesco Poli wrote is correct.... but
(1) the Zend engine can be distributed and modified under the (significantly
better) Zend license.
(2) This can be used even for the distribution of the Zend engine as *part
of* PHP (as an alternative to the PHP license).
(3) If this is done, derivative works can be distributed comfortably under
the same terms.

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