+
+/*
+ * Japanese charset extra function
+ *
+ */
+function japanese_charset_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') {
+
+ $ret = mb_convert_encoding($ret, 'EUC-JP', 'AUTO');
+ }
+ break;
+ case 'encode':
+ $detect_encoding = mb_detect_encoding($ret);
+ if ($detect_encoding == 'JIS' ||
+ $detect_encoding == 'EUC-JP' ||
+ $detect_encoding == 'SJIS') {
+
+ $ret = mb_convert_encoding($ret, 'JIS', 'AUTO');
+ }
+ break;
+ case 'strimwidth':
+ $width = func_get_arg(2);
+ $ret = mb_strimwidth($ret, 0, $width, '...');
+ break;
+ case 'encodeheader':
+ $ret = mb_encode_mimeheader($ret);
+ 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;
+ default:
+ break;
+ }
+ }
+ return $ret;
+}
+
+