4 * iso-8859-1 encoding functions
6 * takes a string of unicode entities and converts it to a iso-8859-1 encoded string
7 * Unsupported characters are replaced with ?.
9 * @copyright © 2004-2009 The SquirrelMail Project Team
10 * @license http://opensource.org/licenses/gpl-license.php GNU Public License
12 * @package squirrelmail
17 * Converts string to iso-8859-1
18 * @param string $string text with numeric unicode entities
19 * @return string iso-8859-1 encoded text
21 function charset_encode_iso_8859_1 ($string) {
22 // don't run encoding function, if there is no encoded characters
23 if (! preg_match("'&#[0-9]+;'",$string) ) return $string;
25 $string=preg_replace("/&#([0-9]+);/e","unicodetoiso88591('\\1')",$string);
26 // $string=preg_replace("/&#[xX]([0-9A-F]+);/e","unicodetoiso88591(hexdec('\\1'))",$string);
32 * Return iso-8859-1 symbol when unicode character number is provided
34 * This function is used internally by charset_encode_iso_8859_1
35 * function. It might be unavailable to other SquirrelMail functions.
36 * Don't use it or make sure, that functions/encode/iso_8859_1.php is
39 * @param int $var decimal unicode value
40 * @return string iso-8859-1 character
42 function unicodetoiso88591($var) {