public function add($table, $rowArr){
    $editId = $this->rows($table);

        if($this->edit_id != null){
        $editId = $this->edit_id;
        }

        foreach($this->cols[$table] as $colname){
        $this->rows[$table][$colname][$editId] = $rowArr[$colname];
        }

    return $editId;
    }