4 * koi8-u encoding functions
6 * takes a string of unicode entities and converts it to a koi8-u encoded string
7 * Unsupported characters are replaced with ?.
9 * @copyright © 2004-2006 The SquirrelMail Project Team
10 * @license http://opensource.org/licenses/gpl-license.php GNU Public License
12 * @package squirrelmail
17 * Converts string to koi8-u
18 * @param string $string text with numeric unicode entities
19 * @return string koi8-u encoded text
21 function charset_encode_koi8_u ($string) {
22 // don't run encoding function, if there is no encoded characters
23 if (! preg_match("'&#[0-9]+;'",$string) ) return $string;
25 $string=preg_replace("/&#([0-9]+);/e","unicodetokoi8u('\\1')",$string);
26 // $string=preg_replace("/&#[xX]([0-9A-F]+);/e","unicodetokoi8u(hexdec('\\1'))",$string);
32 * Return koi8-u symbol when unicode character number is provided
34 * This function is used internally by charset_encode_koi8_u
35 * function. It might be unavailable to other SquirrelMail functions.
36 * Don't use it or make sure, that functions/encode/koi8_u.php is
39 * @param int $var decimal unicode value
40 * @return string koi8-u character
42 function unicodetokoi8u($var) {
44 $koi8uchars=array('160' => "\x9A",
173 if (array_key_exists($var,$koi8uchars)) {
174 $ret=$koi8uchars[$var];