Newsgroups: php.internals
Path: news.php.net
Xref: news.php.net php.internals:87938
Mailing-List: contact internals-help@lists.php.net; run by ezmlm
Received-SPF: pass (pb1.pair.com: domain gmail.com designates 209.85.212.177 as permitted sender)
MIME-Version: 1.0
In-Reply-To: <F401D204-40AE-43A9-A0F9-F3160025712D@craigfrancis.co.uk>
References: <CAKws9z27kVJ87Ur5Qo+ayYHPeeO=aYKpRHUV4TFBXX2iMcgO2A@mail.gmail.com>
	<55DD4269.4090402@gmail.com>
	<6348DFA7-04BD-41BB-A500-17A8A531B56C@craigfrancis.co.uk>
	<55DDDEE1.3000001@gmail.com>
	<F401D204-40AE-43A9-A0F9-F3160025712D@craigfrancis.co.uk>
Date: Wed, 26 Aug 2015 12:35:34 -0600
Message-ID: <CAObuZdtqU=zCOwuYUcZ72Ajy3NnNUj4sky-G+L42ybKW1g_T-g@mail.gmail.com>
To: Craig Francis <craig@craigfrancis.co.uk>
Cc: Stanislav Malyshev <smalyshev@gmail.com>, Scott Arciszewski <scott@paragonie.com>, 
	PHP Internals <internals@lists.php.net>
Content-Type: multipart/alternative; boundary=bcaec53f2e41beac61051e3b1d8b
Subject: Re: [PHP-DEV] PHP 7.1 - Address PHPSadness #28?
From: derokorian@gmail.com (Ryan Pallas)

--bcaec53f2e41beac61051e3b1d8b
Content-Type: text/plain; charset=UTF-8

On Wed, Aug 26, 2015 at 11:08 AM, Craig Francis <craig@craigfrancis.co.uk>
wrote:

> On 26 Aug 2015, at 16:44, Stanislav Malyshev <smalyshev@gmail.com> wrote:
>
> >> Depending on the website I may then add a key to define the
> >> 'report-uri', or I may set it to NULL to say that I don't want one.
> >
> > NULL is not the best value to for this, but the function you're looking
> > for is array_key_exists().
>
>
>
> What would be the best value?
>
> And the array_key_exists() function has already been mentioned (and is
> what I'm using... but I cut that bit out to keep the reply shorter, as
> mentioned in my previous email).
>
>
What I would do is use false to me I don't want this, and null/not set to
mean do the default, and a value to mean this is what I want. Then you end
up with:

if (!isset($val)) {
   // do the default
} elseif (!empty($val)) {
   // do something with $val
}
// else do nothing because I don't want this thing

On the other hand, if I'm designing something using null as a special case
value, then I would just use array_key_exists and is_null (these calls
exist a few times in my code) but generally speaking I try not to give null
special meaning.

--bcaec53f2e41beac61051e3b1d8b--