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Date: Sat, 26 Feb 2022 23:10:27 +0000
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Subject: Re: [PHP-DEV] Re: Proposal for RFC to remove undefined array
 indexwarning when used ina ternary
From: marandall@php.net (Mark Randall)
Message-ID: <php.internals-117147@news.php.net>

On 26/02/2022 22:34, Robert Landers wrote:
> This is not semantically the same though. A $_POST of a form, for example,
> will usually contain an empty value if the form input was empty, but
> missing if the form control wasn't in the form (maybe the form control is
> injected via Javascript, or conditionally output by the script).


PHP is a general purpose language, the behaviour you're asking for is 
specific to one use case and may be of detriment to others, without 
offering significant benefit in exchange.

I suggest you write yourself a function that performs the operations for 
you. This may also be a good opportunity to move away from directly 
accessing the superglobals in userland code.

$form->get('foo', 'defaultgoeshere');

Performance concerns would be so so small they would be practically 
undetectable in the context of a real request.

Also, this:

$name = empty($_POST['name'] ?? 'Default Name') ?: 'Default Name';

Should be:

$name = ($_POST['name'] ?? null) ?: 'Default Name')

--
Mark Randall