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Date: Tue, 12 Apr 2016 12:56:31 +0000
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To: Sebastian Bergmann <sebastian@php.net>, PHP Internals <internals@lists.php.net>
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Subject: Re: [PHP-DEV] UUID
From: colinodell@gmail.com ("Colin O'Dell")

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On Tue, Apr 12, 2016 at 2:09 AM Sebastian Bergmann <sebastian@php.net>
wrote:

> In PHP 7.0 we introduced random_bytes() which wraps Linux's getrandom(2)
> as well as Windows's CryptGenRandom() and uses /dev/urandom as a fallback.
>
> I think it would be great if we added a function that wraps
> /proc/sys/kernel/random/uuid [2] and, if that exists, its equivalent on
> Windows to make the generation of UUIDs easy.
>
> Thoughts?
>

I'd love to see UUID generation in core using a similar platform-based
approach, as long as the implementation matches RFC 4122.  Part of this
will be determining which versions/variants should be supported:
https://en.wikipedia.org/wiki/Universally_unique_identifier#RFC_4122_Variant

Version 4 (random) UUIDs is an obvious choice, but should any others be
supported initially?

Perhaps the implementation could be a simple function named random_uuid()
which either takes no parameters or a single parameter "$version" which
defaults to 4?

Regards,

Colin

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