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Date: Fri, 30 May 2025 00:31:22 +0100
To: internals@lists.php.net, Kamil Tekiela <tekiela246@gmail.com>,
 Adam Cable <adamcable@gmail.com>
Subject: Re: [PHP-DEV] Adding in a case-insensitive version of str_contains
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From: derick@php.net (Derick Rethans)

On 29 May 2025 22:00:00 BST, Kamil Tekiela <tekiela246@gmail=2Ecom> wrote:
>As I understand, it was a conscious decision not to add this function
>when str_contains was created=2E The reason is that case sensitivity is
>locale-dependent, and for such use cases, mbstring extension is better
>[1] & [2]=2E Do you think that locale is a concern here, and if not,
>why? Would it be a good idea to add mb_str_icontains instead?

mbstring doesn't deal with, or handle, locales, only charactersets=2E So t=
hat wouldn't be a good fit either=2E=20

There is grapheme_stripos, but that also doesn't do it locale dependent: <=
https://www=2Ephp=2Enet/manual/en/function=2Egrapheme-stripos=2Ephp>

PHP could really do with a locale aware, grapheme aware, set of Text utili=
ties=2E=20

I have a prototype at <https://github=2Ecom/derickr/php-text> where this s=
uggested function also would fit in=2E=20

cheers=20
Derick=20