function _fetch_mesg($mesgid){
        if( ! isset($this->STH_FETCH_MESG)  ){
            $this->STH_FETCH_MESG = $this->DBH->prepare("
                SELECT *, 
                DATEDIFF(NOW(), mesgdate) as age 
                FROM $this->TABN WHERE mesgid=?");
        }
        $this->STH_FETCH_MESG->execute(array($mesgid));
        $mesg = $this->STH_FETCH_MESG->fetchAll();
        if( empty($mesg) ){ dd("Diese Nachricht existiert nicht!"); }
        return $mesg[0];
    }