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1 | <?php |
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2 | /** |
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3 | * decode/utf-8.php |
4 | * $Id$ |
5 | * |
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6 | * Copyright (c) 2003-2004 The SquirrelMail Project Team |
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7 | * Licensed under the GNU GPL. For full terms see the file COPYING. |
8 | * |
9 | * This file contains utf-8 decoding function that is needed to read |
10 | * utf-8 encoded mails in non-utf-8 locale. |
11 | * |
12 | * Every decoded character consists of n bytes. First byte is octal |
13 | * 300-375, other bytes - always octals 200-277. |
14 | * |
15 | * \a\b characters are decoded to html code octdec(a-300)*64 + octdec(b-200) |
16 | * \a\b\c characters are decoded to html code octdec(a-340)*64*64 + octdec(b-200)*64 + octdec(c-200) |
17 | * |
18 | * decoding cycle is unfinished. please test and report problems to tokul@users.sourceforge.net |
19 | * |
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20 | * @package squirrelmail |
21 | * @subpackage decode |
22 | */ |
23 | |
24 | /** |
25 | * Decode utf-8 strings |
26 | * @param string $string Encoded string |
27 | * @return string Decoded string |
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28 | */ |
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29 | function charset_decode_utf_8 ($string) { |
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30 | global $default_charset,$squirrelmail_language; |
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31 | |
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32 | if ($squirrelmail_language == 'ja_JP') |
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33 | return $string; |
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34 | |
35 | /* Only do the slow convert if there are 8-bit characters */ |
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36 | /* avoid using 0xA0 (\240) in ereg ranges. RH73 does not like that */ |
37 | if (! ereg("[\200-\237]", $string) and ! ereg("[\241-\377]", $string)) |
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38 | return $string; |
39 | |
40 | // decode three byte unicode characters |
41 | $string = preg_replace("/([\340-\357])([\200-\277])([\200-\277])/e", |
42 | "'&#'.((ord('\\1')-224)*4096+(ord('\\2')-128)*64+(ord('\\3')-128)).';'", |
43 | $string); |
44 | |
45 | // decode two byte unicode characters |
46 | $string = preg_replace("/([\300-\337])([\200-\277])/e", |
47 | "'&#'.((ord('\\1')-192)*64+(ord('\\2')-128)).';'", |
48 | $string); |
49 | |
50 | return $string; |
51 | } |
52 | |
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53 | ?> |