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Re: The Future of PHP [message #171020 is a reply to message #171018] Wed, 15 December 2010 03:24 Go to previous messageGo to previous message
Adam Harvey is currently offline  Adam Harvey
Messages: 25
Registered: September 2010
Karma:
Junior Member
On Tue, 14 Dec 2010 22:17:46 -0500, Jerry Stuckle wrote:
> On 12/14/2010 9:51 PM, Adam Harvey wrote:
>> The Zend Engine License (available in Zend/LICENSE within the PHP
>> source tree) explicitly deals with this problem. To quote section 4 of
>> said licence:
>>
>> 4. Zend Technologies Ltd. may publish revised and/or new versions
>> of the license from time to time. Each version will be given a
>> distinguishing version number.
>> Once covered code has been published under a particular version
>> of the license, you may always continue to use it under the terms
>> of that version. You may also choose to use such covered code
>> under the terms of any subsequent version of the license
>> published by Zend Technologies Ltd. No one other than Zend
>> Technologies Ltd. has the right to modify the terms applicable to
>> covered code created under this License.
>>
>> The important bit is that covered code can always be used under the
>> version of the Zend Engine License. Even in the incredibly unlikely
>> situation that Zend were to get bought out and development of the Zend
>> Engine was closed, the most recent version of the Zend Engine included
>> in the PHP source tree would remain open source, and I dare say that
>> development would continue on that open source version of the Zend
>> Engine regardless: much of the work that occurs on the engine comes
>> from developers who aren't employed by Zend anyway.
>
> The important point here is:
>
> "No one other than Zend Technologies Ltd. has the right to modify the
> terms applicable to covered code created under this License.
>
> If someone buys Zend out, they are free to modify any and all licenses.
> That includes revoking those same licenses.

That has to be read in conjunction with the earlier part:

Once covered code has been published under a particular version
of the license, you may always continue to use it under the
terms of that version.

Zend can, of course, change the terms of the licence at any time by
releasing a revised version of the licence, but you (and everyone else)
retains the right to use the code released under the "Zend Engine
License, Version 2.00" under those exact terms in perpetuity. That
licence on that code is explicitly irrevocable.

Adam, who will bow out of this thread now and leave Jerry to have the
last word on how black is white.

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