[Intl] Add a special locale to strip emojis easily with EmojiTransliterator

[fancyweb]

Q	A
Branch?	6.3
Bug fix?	no
New feature?	yes
Deprecations?	no
Tickets	-
License	MIT
Doc PR	-

I'd like to add a special locale strip to the emoji transliterator to easily remove all emojis from a string. It would only work with valid input/emojis.

Removing emojis from a string is not easy. Regexes are complicated and most of the time not up-to-date with the latest Unicode versions. I thought we could leverage the new transliterator 😄

[lyrixx]

I like it

[javiereguiluz]

I like this feature (and I've needed it myself more than once ... I agree with what you said about regexes).

What I don't like is "hacking" this feature as a special non-real locale. This is a convention that developers must learn, so it makes it a bit more difficult. I wonder if we could add a removeEmojis() method in String component or any other method somewhere. Thanks.

[nicolas-grekas]

LGTM.

This is not really a locale but a transliteration rule. This belongs to the EmojiTransliterator to me.
(the patch demonstrates it quite strongly: there is no new code here, just a new map.)

[ro0NL]

i'd still be in favor of String integration, u($s)->stripEmoji()->toString()

[nicolas-grekas]

i'd still be in favor of String integration, u($s)->stripEmoji()->toString()

That'd be 👎 on my side. I don't see why this specific translit rule would deserve such an important place.

[ro0NL]

i assumed our removeEmoji() removed emoji, but in fact it transliterates them to codes 🤦 (based on https://github.com/aaronpk/emoji-detector-php)

nevertheless i still think controlling the emoji at String level is nice to have

[nicolas-grekas]

Thank you @fancyweb.