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Date: Wed, 23 Sep 2015 10:38:37 +0200
Cc: Lester Caine <lester@lsces.co.uk>,
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To: Rowan Collins <rowan.collins@gmail.com>
Subject: Re: [PHP-DEV] PHP 7.1 - Address PHPSadness #28?
From: mike@php.net (Michael Wallner)


> On 19 09 2015, at 23:22, Rowan Collins <rowan.collins@gmail.com> =
wrote:
>=20
> On 19 September 2015 15:49:55 BST, Lester Caine <lester@lsces.co.uk> =
wrote:
>> On 19/09/15 13:15, Rowan Collins wrote:
>> If there was a bug with 'isset' it is that it returns false for a
>> variable that IS SET to null.
>=20
> I honestly think that the only problem there is the name. If instead =
of isset() and empty() we had quiet_is_null and quiet_boolval, nobody =
would be the slightest bit surprised by their behaviour, and people =
looking to see if an array key exists would be more likely to find =
array_key_exists.
>=20
>=20
>> if the variable does not exist there is no way of testing for that
>> state
>> prior to calling is_null()
>=20
> Correct, there is no way of testing for that full stop.

There is, though, not sure if already mentioned:

array_key_exists(=E2=80=9Cvar=E2=80=9D, get_defined_vars()) && =
is_null($var)