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1 | <?php |
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2 | |
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3 | /** |
4 | * iso-8859-1 encoding functions |
5 | * |
6 | * takes a string of unicode entities and converts it to a iso-8859-1 encoded string |
7 | * Unsupported characters are replaced with ?. |
8 | * |
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9 | * @copyright 2004-2013 The SquirrelMail Project Team |
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10 | * @license http://opensource.org/licenses/gpl-license.php GNU Public License |
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11 | * @version $Id$ |
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12 | * @package squirrelmail |
13 | * @subpackage encode |
14 | */ |
15 | |
16 | /** |
17 | * Converts string to iso-8859-1 |
18 | * @param string $string text with numeric unicode entities |
19 | * @return string iso-8859-1 encoded text |
20 | */ |
21 | function charset_encode_iso_8859_1 ($string) { |
22 | // don't run encoding function, if there is no encoded characters |
23 | if (! preg_match("'&#[0-9]+;'",$string) ) return $string; |
24 | |
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25 | $string=preg_replace_callback("/&#([0-9]+);/",'unicodetoiso88591',$string); |
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26 | |
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27 | return $string; |
28 | } |
29 | |
30 | /** |
31 | * Return iso-8859-1 symbol when unicode character number is provided |
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32 | * |
33 | * This function is used internally by charset_encode_iso_8859_1 |
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34 | * function. It might be unavailable to other SquirrelMail functions. |
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35 | * Don't use it or make sure, that functions/encode/iso_8859_1.php is |
36 | * included. |
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37 | * |
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38 | * @param array $matches array with first element a decimal unicode value |
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39 | * @return string iso-8859-1 character |
40 | */ |
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41 | function unicodetoiso88591($matches) { |
42 | $var = $matches[1]; |
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43 | |
44 | if ($var < 256) { |
45 | $ret = chr ($var); |
46 | } else { |
47 | $ret='?'; |
48 | } |
49 | return $ret; |
50 | } |