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Date: Tue, 26 Jun 2018 15:42:04 +0100
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To: Marc Bennewitz <dev@mabe.berlin>
Cc: PHP internals <internals@lists.php.net>
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Subject: Re: [PHP-DEV] [RFC][Under Discussion] Add functions
 array_key_first()and array_key_last()
From: rowan.collins@gmail.com (Rowan Collins)

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On 26 June 2018 at 08:58, Marc Bennewitz <dev@mabe.berlin> wrote:

> Hi all,
>
> I just want to add some information that I feel it's missing in that
> discussion - I'm sorry if it was mentioned already.
>
> 1. It's already possible to extract the key and value of any index
> position of an array using array_slice: https://3v4l.org/mib99
>
> 2. "array_[key|value]_[first|last]($array)" is in my opinion not a good
> option as it lacks the possibility to extract key/value from any position.
> Something like "array_[key|value]_index($array, $index)" where $index
> would be the index position or negative index position from right.
>


The big advantage of separate functions is that they make the intent clear;
we could combine all four functions into one: array_index(int $position,
bool $key), but "array_key_last($something)" is a lot clearer to read than
"array_index($something, -1, true)". Are there actually use cases for
getting "the 5th key from the end of the array", common enough to make "the
last key in the array" harder to write?

Regards,
-- 
Rowan Collins
[IMSoP]

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