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Date: Mon, 15 Aug 2011 16:51:01 +0800
Message-ID: <CABBJUpfHGHFHniUQ1yV-vZ5-J99CG38uH2bnH17-e_9i=kOASA@mail.gmail.com>
To: Lester Caine <lester@lsces.co.uk>
Cc: PHP Internals <internals@lists.php.net>
Content-Type: text/plain; charset=UTF-8
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Subject: Re: [PHP-DEV] [VOTE]strn(case)cmp supporting a negative length as its
 third paramter
From: laruence@php.net (Laruence)

Hi Lester:
   I totally agree with you about bc break things,

   but actully I don't think this proposal will bring a big bc break,
it's a new approach , but not a big change,

   I am meaning that the old codes can work fine because rarely codes
depends on a negative length.

   do you agree?

thanks

2011/8/15 Lester Caine <lester@lsces.co.uk>:
> Laruence wrote:
>>
>> =C2=A0 =C2=A0yes, =C2=A0substr_compare can do it, and it also supports n=
egative
>> length argument too.
>
> I am with Rasmus ... while the BC problem he is pointing out is probably
> very rare, those are the worse ones to fix when they pop up intermittentl=
y,
> and usually when 10 year old code has been working fine and suddenly star=
ts
> doing it?
>
> All of the original base str... functions currently follow the libc manua=
l (
> I think ) and that is how they work. My first thought when the thread
> started was that this needed a different name - which is exactly why
> substr_compare exists? Although nothing is appearing in my archive, I'm s=
ure
> that this discussion has already happened long ago when this was added to
> PHP5? Perhaps it should be linked in the SeeAlso from strncmp and the res=
t?
>
>> =C2=A0 =C2=A0 but I am proposal to improve strn(case)cmp, so they are no=
t =C2=A0conflict
>> .:)
>
> One persons improvement can become someone elses BC nightmare?
>
> I seem to recall a discussion about tidying up many of the string functio=
ns,
> probably part of unicode compatibility, and in that vane, would it be
> possible to create a 'namespace' version of string functions which could =
be
> a little more consistent, and also offer the chance to switch to full
> unicode comparison if required? sb:: -> mb:: transparently working the sa=
me
> way? needle and haystack order comes to mind as well?
>
> Is there any reason there is not an mb_substr_compare ?
> Yes character based rather than byte. Seems to me that this is the way to=
 go
> rather than changing the other functions? Actually substr_compare will ti=
dy
> up a bit of a mess in my own code where I need to switch case on and off =
I'd
> just not remembered it existed ....
>
> --
> Lester Caine - G8HFL
> -----------------------------
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--=20
Laruence =C2=A0Xinchen Hui
http://www.laruence.com/