[php] List of All Locales and Their Short Codes?

From http://www.w3.org/International/articles/language-tags/

"Language tag syntax is defined by the IETF's BCP 47. BCP stands for 'Best Current Practice', and is a persistent name for a series of RFCs whose numbers change as they are updated. The latest RFC describing language tag syntax is RFC 5646, Tags for the Identification of Languages, and it obsoletes the older RFCs 4646, 3066 and 1766.

You used to find subtags by consulting the lists of codes in various ISO standards, but now you can find all subtags in the IANA Language Subtag Registry."

AFAIK most locale-aware applications (that are written by professionals) abide by this standard. It isn't just something somebody threw together and that different people interpret differently.

I'd strongly suggest you investigate the internationalization features of your particular development language, as you'll probably end up reinventing the wheel if you don't.

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