public static function escXml($string)
{
$string = preg_replace('/[^\\x{0009}\\x{000a}\\x{000d}\\x{0020}-\\x{D7FF}\\x{E000}-\\x{FFFD}]+/u', ' ', $string);
$string = str_replace(array("&", "<", ">", '"', "'"), array("&", "<", ">", """, "'"), $string);
return $string;
}