static function sread($id)
 {
     $sessionconn = self::get_sessionconn();
     if (!$sessionconn) {
         return false;
     }
     $sql = "SELECT 1,`value` FROM `sessions` WHERE `sessionid` = '{$id}'";
     $result = $sessionconn->query($sql);
     if (mysqli_error($sessionconn) || !$result || !mysqli_num_rows($result)) {
         return false;
     }
     self::$data = $result->fetch_assoc();
     return stripslashes(self::$data['value']);
 }