† $ php -r ' var_dump( mb_language()); mb_language( "ja"); var_dump( mb_internal_encoding()); var_dump( mb_regex_encoding()); mb_internal_encoding( "EUC-JP"); var_dump( mb_regex_encoding()); var_dump( mb_regex_encoding( "UTF-8")); var_dump( mb_regex_encoding());' string(7) "neutral" string(10) "ISO-8859-1" string(10) "ISO-8859-1" string(10) "ISO-8859-1" bool(true) string(5) "UTF-8" $ php -d mbstri