Tickets :: Comment on [#5972] MIME encoding of multibyte JP characters

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Comment	> This one is easy. None of our MIME:: functions work with multibyte > characters. And it may be difficult to fix this in PHP since we need > a multibyte character-aware regular expression engine, and mb_ereg() > doesn't seem to accept ISO-2022-JP as a valid charset - I get > 'Warning: mb_regex_encoding() [function.mb-regex-encoding]: Unknown > encoding "ISO-2022-JP"' errors. > > > > It is possible to use mb_encode_mimeheader() to encode multibyte > headers properly, but mb_encode_mimeheader() is much much too greedy > to use on everyday, non multi-byte messages (it apparently will > encoding everything, even if the string is ASCII). So this is a > viable solution only if we can restrict use of this function to > multibyte charsets only. is there an easy way to determine if a > charset is multibyte or not (without maintaing a static list)?
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