functions/decode/us_ascii.php

   1 <?php
   2
   3 /**
   4  * functions/decode/us_ascii.php
   5  *
   6  * This file contains us-ascii decoding function that is needed to read
   7  * us-ascii encoded mails in non-us-ascii locale.
   8  *
   9  * Function replaces all 8bit symbols with '?' marks
  10  *
  11  * @copyright 2004-2017 The SquirrelMail Project Team
  12  * @license http://opensource.org/licenses/gpl-license.php GNU Public License
  13  * @version $Id$
  14  * @package squirrelmail
  15  * @subpackage decode
  16  */
  17
  18 /**
  19  * us-ascii decoding function.
  20  *
  21  * @param string $string string that has to be cleaned
  22  * @return string cleaned string
  23  */
  24 function charset_decode_us_ascii ($string) {
  25     // don't do decoding when there are no 8bit symbols
  26     if (! sq_is8bit($string,'us-ascii'))
  27         return $string;
  28
  29     $string = preg_replace("/([\201-\237])/","'?'",$string);
  30
  31     /* I don't want to use 0xA0 (\240) in any ranges. RH73 may dislike it */
  32     $string = str_replace("\240", '?', $string);
  33
  34     $string = preg_replace("/([\241-\377])/","'?'",$string);
  35     return $string;
  36 }