clase descargas

[majony]

Hola me base en un ejemplo que encontre en la red ya pude sacer mis documentos a descargar pero ahora tengo una gran duda como podria para poner comentarios sin usar base de datos esta es la clase

Código php:

<?php
 class download {
    var $files = 1;
    var $fileTypes = array();
    var $mimeTypes = array();
    function download($path) {
        $this->path = $path;
        $this->fileTypes = array('jpeg', 'jpg', 'ico', 'png', 'gif', 'bmp');
        $this->ini = dirname(__FILE__)."/mime-type.ini";
        $this->mimeTypes = parse_ini_file($this->ini, false);
    }
    function getMimetype() {
        return (!$this->checkMimetype()) ? 'application/force-download' : $this->mimeTypes[$this->fext];
    }
    function checkMimetype() {
        return isset($this->mimeTypes[$this->fext]) ? true : false;
    } 
    function get($req) {
        preg_match("/^[\.\-\s#_a-zA-Z\d]+$/", $req, $file);
        $this->file = $this->path.$file[0];
        if(!file_exists($this->file)) die("Wrong File Name");
         $this->parts = pathinfo($this->file);
        $this->fname = $this->parts['basename'];
        $this->fext = strtolower($this->parts['extension']);
        $this->fsize = filesize($this->file);
        $this->type = $this->getMimetype();
        $this->_send();
    }
    function _send() {
        if(ini_get('zlib.output_compression')) ini_set('zlib.output_compression', 'Off');
        header("Pragma: public");
        header("Expires: 0");
        header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
        header("Cache-Control: private",false);
        header("Content-type: ".$this->type."");
        header("Content-Disposition: attachment; filename=\"".$this->fname."\"");
        header("Content-Transfer-Encoding: Binary");
            header("Content-length: ".$this->fsize."");
        set_time_limit(0);
        readfile($this->file);
        exit();
    }
    function _type($file) {
        $dotpos = strrpos($file, ".");
        return strtolower(substr($file, $dotpos + 1));
    }
    function select($name = 'files', $label = '', $curr = '', $chars = 30) {
        if ($handle = opendir($this->path)) {
        $select = '<form method="post" action="'.$_SERVER['PHP_SELF'].'">'."\n";
            $select .= ($label != '') ? '<label for="'.$name.'">'.$label.'</label>'."\n" : '';
            $select .= '<select name="'.$name.'" id="'.$name.'">'."\n";
        $curr = (isset($_REQUEST[$name])) ? $_REQUEST[$name] : $curr;
        $select .= ($curr == "") ? "  <option value=\"\" selected>...\n" : "<option value=\"\">...\n";
            while (false !== ($file = readdir($handle))) {
                $array[] = $file;
            }
            closedir($handle);
            sort($array);
            foreach ($array as $val) {
            $ext = $this->_type($val);
                    if (is_file($this->path.$val) || array_search($ext, $this->fileTypes) !== false) {
                    $select .= '    <option value="'.$val.'">';
                    $select .= (strlen($val) > $chars) ? substr($val, 0, $chars).'..'."</option>\n" : $val."</option>\n";
                    $this->files++;
                }
            }
            $select .= '</select>' ."\n";
        $select .= '<input type="submit" name="download" value="Download" />'."\n";
        $select .= '</form>'."\n";
        }
        return ($this->files == 0) ? "No files!" : $select;
      } 
    }
?>