3eb6bd05 |
1 | <?php |
2 | /** |
3 | * iso-8859-1 encoding functions |
4 | * |
5 | * takes a string of unicode entities and converts it to a iso-8859-1 encoded string |
6 | * Unsupported characters are replaced with ?. |
7 | * |
8 | * @version $Id$ |
9 | * @copyright Copyright © SquirrelMail Development Team, 2004 |
10 | * @package squirrelmail |
11 | * @subpackage encode |
12 | */ |
13 | |
14 | /** |
15 | * Converts string to iso-8859-1 |
16 | * @param string $string text with numeric unicode entities |
17 | * @return string iso-8859-1 encoded text |
18 | */ |
19 | function charset_encode_iso_8859_1 ($string) { |
20 | // don't run encoding function, if there is no encoded characters |
21 | if (! preg_match("'&#[0-9]+;'",$string) ) return $string; |
22 | |
23 | $string=preg_replace("/&#([0-9]+);/e","unicodetoiso88591('\\1')",$string); |
24 | // $string=preg_replace("/&#[xX]([0-9A-F]+);/e","unicodetoiso88591(hexdec('\\1'))",$string); |
25 | |
26 | return $string; |
27 | } |
28 | |
29 | /** |
30 | * Return iso-8859-1 symbol when unicode character number is provided |
31 | * |
32 | * This function is used internally by charset_encode_iso_8859_1 |
33 | * function. It might be unavailable to other squirrelmail functions. |
34 | * Don't use it or make sure, that functions/encode/iso_8859_1.php is |
35 | * included. |
36 | * |
37 | * @param int $var decimal unicode value |
38 | * @return string iso-8859-1 character |
39 | */ |
40 | function unicodetoiso88591($var) { |
41 | |
42 | if ($var < 256) { |
43 | $ret = chr ($var); |
44 | } else { |
45 | $ret='?'; |
46 | } |
47 | return $ret; |
48 | } |
49 | ?> |