function append($data)
    {
        if ($this->_PPS_FILE) {
            fwrite($this->_PPS_FILE, $data);
        } else {
            $this->_data .= $data;
        }
    }
function append($data)
    {
        if ($this->_PPS_FILE) {
            fwrite($this->_PPS_FILE, $data);
        } else {
            $this->_data .= $data;
        }
    }
function append ( $ data ) { if ( $ this -> _PPS_FILE ) { fwrite ( $ this -> _PPS_FILE , $ data ) ; } else { $ this -> _data .= $ data ; } }
Append data to PPS

@access public
@param string $data The data to append
Append data to PPS