private function getCharArray($text)
{
$encoding = \mb_detect_encoding($text);
$len = \mb_strlen($text, $encoding);
$ret = array();
while ($len) {
$ret[] = \mb_substr($text, 0, 1, $encoding);
$text = \mb_substr($text, 1, $len, $encoding);
$len = \mb_strlen($text, $encoding);
}
return $ret;
}