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- <?php
- /*
- * decode/utf-8.php
- * $Id$
- *
- * Copyright (c) 2003 The SquirrelMail Project Team
- * Licensed under the GNU GPL. For full terms see the file COPYING.
- *
- * This file contains utf-8 decoding function that is needed to read
- * utf-8 encoded mails in non-utf-8 locale.
- *
- * Every decoded character consists of n bytes. First byte is octal
- * 300-375, other bytes - always octals 200-277.
- *
- * \a\b characters are decoded to html code octdec(a-300)*64 + octdec(b-200)
- * \a\b\c characters are decoded to html code octdec(a-340)*64*64 + octdec(b-200)*64 + octdec(c-200)
- *
- * decoding cycle is unfinished. please test and report problems to tokul@users.sourceforge.net
- *
- */
- function charset_decode_utf8 ($string) {
- global $default_charset;
- if (strtolower($default_charset) == 'utf-8')
- return $string;
- /* Only do the slow convert if there are 8-bit characters */
- /* avoid using 0xA0 (\240) in ereg ranges. RH73 does not like that */
- if (! ereg("[\200-\237]", $string) and ! ereg("[\241-\377]", $string))
- return $string;
- // decode three byte unicode characters
- $string = preg_replace("/([\340-\357])([\200-\277])([\200-\277])/e",
- "'&#'.((ord('\\1')-224)*4096+(ord('\\2')-128)*64+(ord('\\3')-128)).';'",
- $string);
- // decode two byte unicode characters
- $string = preg_replace("/([\300-\337])([\200-\277])/e",
- "'&#'.((ord('\\1')-192)*64+(ord('\\2')-128)).';'",
- $string);
- return $string;
- }
- ?>
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