CLASS D'ENSEMBLE DE FICHIERS À TÉLÉCHARGER

<?php
/**
 * Project:
 * File:        fmk_download_inc.php
 * Class:       Download
 *
 * This class makes you able to create a downloadable object that
 * contains a set of downloadable files and start the download of a
 * specific one.
 *
 * @author jean_poldeux <jean_poldeux@hotmail.com>
 * @date December 20th, 2004
 * Updated July 26th, 2005
 * @version 0.1
 */

class Download
    {
    /**
     * Basic constructor that initialises mimeTypes allowed
     */
    function Download()
        {
        $this->filenames=array();
        $this->types=array();
        $this->mime=array(
                          array(".htm","text/html"),
                          array(".html","text/html"),
                          array(".txt","text/plain"),
                          array(".gif","image/gif"),
                          array(".jpg","image/jpeg"),
                          array(".zip","application/zip"),
                          array(".pdf","application/pdf"),
                          array(".ppt","application/mspowerpoint"),
                          array(".xls","application/excel"),
                          array(".doc","application/msword"),
                          array(".exe","application/octet-stream")
                          );
        }
        
    /**
     * Add a file to the current set
     * @param $filename : File Name that can be downloaded (STRING)
     * @return : Boolean value = TRUE if the has correctly been added - FALSE if it isn't a file, the file doesn't exist
     * or is already in the set
     */
    function addFile($filename)
        {
        //Check if it is really a file and if it exists on the disk
        if (is_file($filename) && file_exists($filename))
            {
            //Check if the file is not already in
            if(!in_array($filename,$filenames))
                {
                //add it to the file set
                array_push($this->filenames,$filename);
                $extension=substr($filename,strrpos($filename,'.')+1);
                //Check the type of download required and add it to the set
                for($i=0;$i<=count($this->mime);$i++)
                    {
                    if (strcmp($extension,$this->mime[$i][0])==0)
                        {
                        array_push($this->types,$this->mime[$i][1]);
                        return true;
                        }
                    }
                return false;
                }
            else return false;
            }
        else return false;
        }
        
    /**
     * Remove a specific file from the set given by the index number
     * @param $index : index value of the file that has to be deleted (INTEGER)
     * @return : Boolean value = TRUE if it has correctly been removed - FALSE if the index is out of bounds or not number
     */
    function removeFile($index)
        {
        if(is_int($index) && $index>0 && $index<=count($this->filenames))
            {
            array_splice($this->filenames,($index-1),1);
            array_splice($this->types,($index-1),1);
            return true;
            }
        else return false;
        }
        
    /**
     * Remove all files from the set
     */
    function removeFiles()
        {
        array_splice($this->filenames,0);
        array_splice($this->types,0);
        }
        
    /**
     * Get the number of files that are contained in the set
     * @return : Number of files in the set (INTEGER)
     */
    function getNbFiles()
        {
        return count($this->filenames);
        }
        
    /**
     * Add a new mime type to the default one
     * @param $extension : extension of the new file type (STRING)
     * @param $handling_method : download method which depends on the new file type (STRING) 
     * @return : Boolean value = TRUE if it has correctly insered - FALSE if the extension already exists
     */
    function addMimeType($extension, $handling_method)
        {
        //Add a dot before file extension if there isn't one
        if(strcmp(substr($extension, 0, 1),".") != 0)
          {
          $extension = ".".$extension;
          }
        //Check if the extension doesn't already exists in this object
        if(array_key_exists($extension, $mime)
          {
          return false;
          }
        else
          {
          $this->mime[$extension] = $handling_method;
          }
        }
        
    /**
     * Start the download of specific file given by the index number
     * @param $index : (INTEGER) index value of the file that has to be downloaded
     * @return : Boolean value = TRUE if it has correctly started - FALSE if the index is out of bounds or not number
     */
    function startDownloadIndex($index)
        {
        if(is_int($index) && $index>0 && $index<=count($this->filenames))
            {
            $file=basename($this->filenames[$index-1]);
            header("Content-disposition: attachment; filename=".$this->filenames[$index-1]);
            header("Content-Type: application/force-download");
            header("Content-Transfer-Encoding: ".$this->types[$index-1]."\n");
            header("Content-Length: ".filesize($this->filenames[$index-1]));
            header("Pragma: no-cache");
            header("Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0, public");
            header("Expires: 0");
            readfile($this->filenames[$index-1]);
            return true;
            }
        else return false;
        }
    /**
     * Start the download of specific file given by the filename
     * @param $filename : (STRING) Name of the file that has to be downloaded
     * @return : Boolean value = TRUE if it has correctly started - FALSE if the index is out of bounds or not number
     */
    function startDownloadFile($filename)
        {
        $index=array_search($this->filenames)
        if($index)
            {
            $file=basename($this->filenames[$index-1]);
            header("Content-disposition: attachment; filename=".$this->filenames[$index-1]);
            header("Content-Type: application/force-download");
            header("Content-Transfer-Encoding: ".$this->types[$index-1]."\n");
            header("Content-Length: ".filesize($this->filenames[$index-1]));
            header("Pragma: no-cache");
            header("Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0, public");
            header("Expires: 0");
            readfile($this->filenames[$index-1]);
            return true;
            }
        else return false;
        }

 /**
  * @var Set of files names (STRING INDEXED ARRAY)
  */
  var $filenames;   
 
 /**
  * @var Set of download method. It depends on the file type (STRING INDEXED ARRAY)
  */
  var $types;

 /**
  * @var Set of mime types that are allowed (STRING INDEXED ARRAY)
  */
  var $mime;
  }

?>