7956495015cfa65ed62185c10a2312029a74dd90
4 * us_ascii encoding functions
6 * takes a string of unicode entities and converts it to a us-ascii encoded string
7 * Unsupported characters are replaced with ?.
9 * @copyright 2004-2019 The SquirrelMail Project Team
10 * @license http://opensource.org/licenses/gpl-license.php GNU Public License
12 * @package squirrelmail
17 * Converts string to us-ascii
18 * @param string $string text with numeric unicode entities
19 * @return string us-ascii encoded text
21 function charset_encode_us_ascii ($string) {
22 // don't run encoding function, if there is no encoded characters
23 if (! preg_match("'&#[0-9]+;'",$string) ) return $string;
25 $string=preg_replace_callback("/&#([0-9]+);/",'unicodetousascii',$string);
31 * Return us-ascii symbol when unicode character number is provided
33 * This function is used internally by charset_encode_us_ascii
34 * function. It might be unavailable to other SquirrelMail functions.
35 * Don't use it or make sure, that functions/encode/us_ascii.php is
38 * @param array $matches array with first element a decimal unicode value
39 * @return string us-ascii character
41 function unicodetousascii($matches) {