class HtmlEncode {
        static $_convertToHtmlEntitiesSrcEncoding='UTF-8';

        /**
         *  Will not ASCII String conversion to HTML entity
         *
         * @example HtmlEncode::encode(" I have believed "); // The output :我信了
         * @param string $s  The string to encode
         * @return string  return HTML Entity references
         */
        public static function encode($s,$srcEncoding='UTF-8') {
            self::$_convertToHtmlEntitiesSrcEncoding=$srcEncoding;
            return preg_replace_callback('|[^\x00-\x7F]+|',array(__CLASS__,'_convertToHtmlEntities'),$s);
        }

        public static function _convertToHtmlEntities($data) {
            if (is_array($data)) {
                $chars=str_split(iconv(self::$_convertToHtmlEntitiesSrcEncoding,"UCS-2BE",$data[0]),2);
                $chars=array_map(array(__CLASS__,__FUNCTION__),$chars);
                return join("",$chars);
            } else {
                $code=hexdec(sprintf("%02s%02s;",dechex(ord($data {0})),dechex(ord($data {1}))));
                return sprintf("&#%s;",$code);
            }
        }     
    }