-/**
- * Japanese charset extra function
- *
- * Action performed by function is defined by first argument.
- * Default return value is defined by second argument.
- * Use of third argument depends on action.
- *
- * @param string $action action performed by this function.
- * possible values:
- * decode - convert returned string to euc-jp. third argument unused
- * encode - convert returned string to jis. third argument unused
- * strimwidth - third argument=$width. trims string to $width symbols.
- * encodeheader - create base64 encoded header in iso-2022-jp. third argument unused
- * decodeheader - return human readable string from mime header. string is returned in euc-jp. third argument unused
- * downloadfilename - third argument $useragent. Arguments provide browser info. Returns shift-jis or euc-jp encoded file name
- * wordwrap - third argument=$wrap. wraps text at $wrap symbols
- * utf7-imap_encode - returns string converted from euc-jp to utf7-imap. third argument unused
- * utf7-imap_decode - returns string converted from utf7-imap to euc-jp. third argument unused
- * @param string $ret default return value
- */
-function japanese_xtra() {
- $ret = func_get_arg(1); /* default return value */
- if (function_exists('mb_detect_encoding')) {
- switch (func_get_arg(0)) { /* action */
- case 'decode':
- $detect_encoding = @mb_detect_encoding($ret);
- if ($detect_encoding == 'JIS' ||
- $detect_encoding == 'EUC-JP' ||
- $detect_encoding == 'SJIS' ||
- $detect_encoding == 'UTF-8') {
-
- $ret = mb_convert_kana(mb_convert_encoding($ret, 'EUC-JP', 'AUTO'), "KV");
- }
- break;
- case 'encode':
- $detect_encoding = @mb_detect_encoding($ret);
- if ($detect_encoding == 'JIS' ||
- $detect_encoding == 'EUC-JP' ||
- $detect_encoding == 'SJIS' ||
- $detect_encoding == 'UTF-8') {
-
- $ret = mb_convert_encoding(mb_convert_kana($ret, "KV"), 'JIS', 'AUTO');
- }
- break;
- case 'strimwidth':
- $width = func_get_arg(2);
- $ret = mb_strimwidth($ret, 0, $width, '...');
- break;
- case 'encodeheader':
- $result = '';
- if (strlen($ret) > 0) {
- $tmpstr = mb_substr($ret, 0, 1);
- $prevcsize = strlen($tmpstr);
- for ($i = 1; $i < mb_strlen($ret); $i++) {
- $tmp = mb_substr($ret, $i, 1);
- if (strlen($tmp) == $prevcsize) {
- $tmpstr .= $tmp;
- } else {
- if ($prevcsize == 1) {
- $result .= $tmpstr;
- } else {
- $result .= str_replace(' ', '',
- mb_encode_mimeheader($tmpstr,'iso-2022-jp','B',''));
- }
- $tmpstr = $tmp;
- $prevcsize = strlen($tmp);
- }
- }
- if (strlen($tmpstr)) {
- if (strlen(mb_substr($tmpstr, 0, 1)) == 1)
- $result .= $tmpstr;
- else
- $result .= str_replace(' ', '',
- mb_encode_mimeheader($tmpstr,'iso-2022-jp','B',''));
- }
- }
- $ret = $result;
- break;
- case 'decodeheader':
- $ret = str_replace("\t", "", $ret);
- if (eregi('=\\?([^?]+)\\?(q|b)\\?([^?]+)\\?=', $ret))
- $ret = @mb_decode_mimeheader($ret);
- $ret = @mb_convert_encoding($ret, 'EUC-JP', 'AUTO');
- break;
- case 'downloadfilename':
- $useragent = func_get_arg(2);
- if (strstr($useragent, 'Windows') !== false ||
- strstr($useragent, 'Mac_') !== false) {
- $ret = mb_convert_encoding($ret, 'SJIS', 'AUTO');
- } else {
- $ret = mb_convert_encoding($ret, 'EUC-JP', 'AUTO');
-}
- break;
- case 'wordwrap':
- $no_begin = "\x21\x25\x29\x2c\x2e\x3a\x3b\x3f\x5d\x7d\xa1\xf1\xa1\xeb\xa1" .
- "\xc7\xa1\xc9\xa2\xf3\xa1\xec\xa1\xed\xa1\xee\xa1\xa2\xa1\xa3\xa1\xb9" .
- "\xa1\xd3\xa1\xd5\xa1\xd7\xa1\xd9\xa1\xdb\xa1\xcd\xa4\xa1\xa4\xa3\xa4" .
- "\xa5\xa4\xa7\xa4\xa9\xa4\xc3\xa4\xe3\xa4\xe5\xa4\xe7\xa4\xee\xa1\xab" .
- "\xa1\xac\xa1\xb5\xa1\xb6\xa5\xa1\xa5\xa3\xa5\xa5\xa5\xa7\xa5\xa9\xa5" .
- "\xc3\xa5\xe3\xa5\xe5\xa5\xe7\xa5\xee\xa5\xf5\xa5\xf6\xa1\xa6\xa1\xbc" .
- "\xa1\xb3\xa1\xb4\xa1\xaa\xa1\xf3\xa1\xcb\xa1\xa4\xa1\xa5\xa1\xa7\xa1" .
- "\xa8\xa1\xa9\xa1\xcf\xa1\xd1";
- $no_end = "\x5c\x24\x28\x5b\x7b\xa1\xf2\x5c\xa1\xc6\xa1\xc8\xa1\xd2\xa1" .
- "\xd4\xa1\xd6\xa1\xd8\xa1\xda\xa1\xcc\xa1\xf0\xa1\xca\xa1\xce\xa1\xd0\xa1\xef";
- $wrap = func_get_arg(2);
-
- if (strlen($ret) >= $wrap &&
- substr($ret, 0, 1) != '>' &&
- strpos($ret, 'http://') === FALSE &&
- strpos($ret, 'https://') === FALSE &&
- strpos($ret, 'ftp://') === FALSE) {
-
- $ret = mb_convert_kana($ret, "KV");
-
- $line_new = '';
- $ptr = 0;
-
- while ($ptr < strlen($ret) - 1) {
- $l = mb_strcut($ret, $ptr, $wrap);
- $ptr += strlen($l);
- $tmp = $l;