private function ListComments(){
    //Fetching my data
    $comments = static::$DB->SelectData("comments", array("username", "message", "date", "last"));
    //Checking if there is something new added
       if($comments[count($comments)-1]["last"] < count($comments)) {
    //Printing all the fetched data
           print json_encode($comments);
    //Updating the "last" column which is used to check if there are new enteries
           static::$DB->UpdateData("comments", array("last" => count($comments)), array("last" => 0));
       } else {
           print json_encode(array("x"));
           }
}