filters.php

1. 設定只要用戶使用英文或中文界面，過濾語言皆設為繁體中文 zh_TW。

   [root@mail squirrelmail-1.4.8]# diff -wuN ./plugins/filters/filters.php /var/www/squirrelmail/plugins/filters/filters.php
   --- ./plugins/filters/filters.php	2006-07-29 16:46:57.000000000 +0800
   +++ /var/www/squirrelmail/plugins/filters/filters.php	2014-07-21 06:08:51.480883296 +0800
   @@ -300,11 +300,12 @@
    
        $category .= ' UNDELETED';
    
   +    if (strstr($squirrelmail_language,'en') || strstr($squirrelmail_language,'zh')) {$filter_language='zh_TW'; } //dywang 
        if ($allow_charset_search &&
   -        isset($languages[$squirrelmail_language]['CHARSET']) &&
   -        $languages[$squirrelmail_language]['CHARSET']) {
   +        isset($languages[$filter_language]['CHARSET']) &&   //dywang
   +        $languages[$filter_language]['CHARSET']) {
            $search_str = 'SEARCH CHARSET '
   -                    . strtoupper($languages[$squirrelmail_language]['CHARSET'])
   +                    . strtoupper($languages[$filter_language]['CHARSET'])
                        . ' ' . $category;
        } else {
            $search_str = 'SEARCH CHARSET US-ASCII ' . $category;