If you have iconv enabled (visit http://php.net/iconv for more information), you can use this directive to specify the encoding of file names in your system. This option is important only if you use a windows based server. If you use an encoding file system other than the ASCII type like e.g.EUC-CN (which is chinese enoding) some of the options of CKFinder may not work and the name of the file which the user uploaded could be changed. If you want to avoid this kind of situation use only ASCII file names .
Examples of different file system encoding
$config['FilesystemEncoding'] = 'CP1250'; $config['FilesystemEncoding'] = 'ISO-8859-2'; $config['FilesystemEncoding'] = 'UTF-8';