Multibyte for ucfirst function

Hi, Internals

We got feature request for "Multibyte for ucfirst function".
https://github.com/php/php-src/issues/13075

I think make sense for implement this function, but I don't know well
about not-latin language.
I have a question.

gnutix san pick up sample to below:
https://stackoverflow.com/questions/2517947/ucfirst-function-for-multibyte-character-encodings/58915632#58915632

function mb_ucfirst(string $str, ?string $encoding = null): string
{
    return mb_strtoupper(mb_substr($str, 0, 1, $encoding), $encoding)
. mb_substr($str, 1, null, $encoding);
}

mb_strtoupper supports not-latin language, Therefore, that means
effect ucfirst not-latin language.

Manual of mb_strtoupper is shows example #2 not-latin language.
https://www.php.net/manual/en/function.mb-strtoupper.php#refsect1-function.mb-strtoupper-examples

What do we think? Feel free to comment.

Cheers for new year.
Yuya

--

Yuya Hamada (tekimen)

• https://tekitoh-memdhoi.info
• https://github.com/youkidearitai