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Date: Mon, 23 Nov 2015 11:52:29 -0800
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To: PHP internals <internals@lists.php.net>
Subject: Re: [PHP-DEV] PHP7 Coalesce operator
From: shadda@gmail.com (shadda)

Er, that should read, =E2=80=9Canything non (null, false, undefined) is =
true=E2=80=9D=20

> On Nov 23, 2015, at 11:51 AM, shadda <shadda@gmail.com> wrote:
>=20
> Hey, thanks for responding.
>=20
> However, I still think that misses the point, or at least the true =
utility of what I=E2=80=99m proposing.
>=20
> In practice, you can ignore E_NOTICE and php will happily treat null =
and !isset() as the same thing in *most* cases, so that=E2=80=99s not a =
good indicator of truthiness.=20
>=20
> Basically in ECMA, anything non-null, false, or undefined is true. PHP =
is very similar in that regard, but our reliance on E_NOTICE to (ahem) =
enforce isset() checks is why, I assume, we=E2=80=99re introducing the =
?? operator to begin with.=20
>=20
> I just think it=E2=80=99d be nice to have a small variation on this =
feature that was less concerned with a (defined|null) semantic and more =
in keeping with PHP=E2=80=99s overall handling of implicit type =
conversion in expressions.=20
>=20
> Does that make more sense?
>=20
>> On Nov 22, 2015, at 12:41 PM, Andrea Faulds <ajf@ajf.me> wrote:
>>=20
>> Hi,
>>=20
>> shadda wrote:
>>> I had a question-suggestion based around the cool new operator =
we=E2=80=99re getting in PHP7, the ?? operator, which as I understand it =
is the functional equivalent to perl=E2=80=99s // operator; in that they =
both test for whether or not a variable is defined, rather than it=E2=80=99=
s truthiness.
>>=20
>> This is not strictly correct. Though something of a misnomer, the =
'null coalesce operator' checks if a variable doesn't exist, but also =
that it is not null, i.e. it functions like isset().
>>=20
>> Thanks.
>>=20
>> --=20
>> Andrea Faulds
>> http://ajf.me/
>>=20
>> --=20
>> PHP Internals - PHP Runtime Development Mailing List
>> To unsubscribe, visit: http://www.php.net/unsub.php
>>=20
>=20