In my textarea I inputed a char \&\#\x\2\5\B\3;(?) and saved it to the DB. When it is retrieved for DB to the textarea, it becomes ?. This behavior is not what we want. Since we need the process string "\&\#\x\2\5\B\3;" instead of char ?.
Another problem is when we processing pages containing east asian characters, we input "?"(big) as page parameter and it becomes å¤§ when it gets redisplayed.