Tickets :: Comment on [#9617] db_migrate and incorrect charset handling

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Comment	>>> PHP's manual suggest that one should not assume that >>> strtolower()/strtoupper() work correctly with >>> multibyte charset like utf-8. >> >> Where does it say that? I don't see any such suggestions in the man pages. > > It does not it say it in so many words or at least says it > ambiguously: "Note that 'alphabetic' is determined by the current > locale" > > But if we look at php's source code for strtoupper() it works by > bytes, therefore it will not work correctly with UTF-8 encoded > strings that contain non ascii characters. > > Excerpt from ext/standard/string.c: > char php_strtoupper(char s, size_t len) > { > unsigned char c, e; > > c = (unsigned char )s; > e = (unsigned char )c+len; > > while (c < e) { > c = toupper(c); > c++; > } > return s; > } > > The non ascii characters in UTF-8 are multi byte. Therefore using > php's strtoupper()/strtolower() will not work correctly with UTF-8 > encoded strings with non ascii characters. >
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