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Date: Sat, 15 Oct 2016 14:34:33 +0300
To: Yasuo Ohgaki <yohgaki@ohgaki.net>
Cc: Stanislav Malyshev <smalyshev@gmail.com>, Niklas Keller
 <me@kelunik.com>, PHP Internals <internals@lists.php.net>
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Message-ID: <286fe3084638521a3273df037b602ae0@koti.fimnet.fi>
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Subject: Re: [PHP-DEV] wordwrap with negative width
From: lauri.kentta@gmail.com (=?UTF-8?Q?Lauri_Kentt=C3=A4?=)

On 2016-10-13 22:39, Yasuo Ohgaki wrote:
> Hi Stas, Niklas,
> 
> On Thu, Oct 13, 2016 at 2:13 PM, Stanislav Malyshev 
> <smalyshev@gmail.com> wrote:
>>> Sorry for the late reply. Why not keep the current behavior + 
>>> warning?
>> 
>> Because current behavior makes no sense, negative length is not really
>> something that exists.
> 
> I agree Stas.
> 
> If we consider compatibility, keeping nonsense behavior is better.
> However, who sets negative offset and make use of it?
> Compatibility is important, but this current behavior is not important, 
> IMO.

Keeping the current behavior doesn't really cost anything.
Why change it?

It's very easy to imagine a script like this:

<?php
$text_width = $parent_width - $other_width - $margin;
echo wordwrap($text, $text_width);
?>

Here someone tries to calculate $max_width dynamically.
The calculation might produce a negative result sometimes.
The text would be visible, even if it's not word wrapped.
It might not look as expected, but it would be readable.

-- 
Lauri Kenttä