[RFC] [Discussion] Add multibyte trim function (mb_trim, mb_ltrim and mb_rtrim)

2023年10月19日(木) 22:33 Niels Dossche dossche.niels@gmail.com:

Hi Yuya

Hi, internals.

8ctopus san can't send email, so I'm writing new RFC for multibyte
trim function.
https://wiki.php.net/rfc/mb_trim
https://github.com/php/php-src/pull/12459

I would like to under discussion.

Thanks for this.

I have a question about the .. support:
You state "Mapping with other character codes may be incompatible", for one of the reasons not to support this.
Can you please explain this a bit more?

Also, I notice at the top of your RFC it still says: "Status: Draft", I think you forgot to change this.
Similarly, the RFC is not listed under discussion on https://wiki.php.net/rfc.

Regards.
Yuya

Kind regards
Niels

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Hi, Niels.
Thank you for your question and Wiki status is changed.

You state "Mapping with other character codes may be incompatible", for one of the reasons not to support this.
Can you please explain this a bit more?

Sure.
For example, Japanese character code, If try to match hiragana for
each character code,
it will end up with different bytes.

Hiragana letter matches in UTF-8.
[ぁ-ゞ]

But other character code is sometimes different.
example: EUC-JP
[ぁ-ん゛ゝゞ]

Sometimes the order is different why I say "Mapping with other
character codes may be incompatible".
Therefore, I thought it was impossible to express the ".." notation.

Regards
Yuya

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Yuya Hamada (tekimen)

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