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Date: Mon, 11 Jun 2018 14:15:33 +0200
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Subject: Add functions array_key_first() and array_key_last()
From: enno.woortmann@web.de (Enno Woortmann)

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Hello Internals,

I'd like to ask for feedback for my idea.
Some years ago a pull request came up to add array_key_first(), 
array_key_last(), and array_key_index() functions (#347 
<https://github.com/php/php-src/pull/347>).
In the meantime a RFC was published to integrate the functions 
(https://wiki.php.net/rfc/array_key_first_last_index) which was 
discussed in the mailing list two and a half years ago 
(https://externals.io/message/89955).

Since the pull request and the RFC doesn't sustain a real progress and 
in my opinion at least the functions array_key_first(array $a) and 
array_key_last(array $a) would be handy in some cases I'd like to 
propose using a smaller functional scope as a first step including only 
this two functions.
Additional features like returning the value of the requested element or 
the function array_key_index() could be implemented in a later stage if 
required.

I implemented those two functions in a different implementation approach 
which tries to use as much existing code as possible available and 
already created a pull request at https://github.com/php/php-src/pull/3256.=


For the next steps I'd like to create a new RFC as the functional scope 
differs to the existing RFC. Therefor I request a PHP.net wiki account 
(wiki username: wol-soft) to create a new RFC.

Regards,
Enno



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