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Date: Sat, 21 Jul 2012 10:38:08 +1200
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To: PHP Internals <internals@lists.php.net>
Subject: Re: [PHP-DEV] common issue with version_compare()
From: simon@welsh.co.nz (Simon J Welsh)


On 21/07/2012, at 10:22 AM, Hartmut Holzgraefe wrote:

> On 07/20/2012 11:07 PM, Stas Malyshev wrote:
>> 1.0.0 and 1.0 are different things. If you want to make a comparison
>> that takes into account only two components, you can just cut them =
both
>> to two components, then compare.
>=20
> it is hart to imagine a 1.0 followed by 1.0.0 in real world, but
> the only reason for something like this that i can come up with
> is that, for whatever reason, a project wants to change from
> two component version numbers to three component ones right after
> having done a 1.0. And in that case a 1.0.0 following the 1.0
> would be a new release, even if it only differs by the extra .0
>=20
> And so 1.0 < 1.0.0 would be perfectly correct.
>=20
> --=20
> hartmut

I've had to use two digit version numbers when upgrading frameworks =
during
the 5.4 development phrase. This meant that version_compare('5.4', =
PHP_VERSION);
would return -1 for things like 5.4.0-beta1. Padding the 5.4 to 5.4.0 =
would've
broken the comparison, as well as changing the return value of
version_compare('5.4', PHP_VERSION); when running 5.4.0.
---
Simon Welsh
Admin of http://simon.geek.nz/