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Posted by matt on 11/15/06 09:35
Pedro Graca wrote:
> matt wrote:
>
>>I am trying to display a list of files
>>in a directory, then send an email to the admin when one is downloaded.
>
>
> I wrote this set of functions, just for you :)
>
> <?php
> /* ******************************************************
> This code is in the public domain.
> Feel free to use and adapt to your needs.
>
> *** NO GUARANTEES ***
>
> name: file_download.inc.php
> version: 20061114
> Author: Pedro Graca
> ****************************************************** */
>
> ######## download_id_is_valid($id, $filelist)
> # verifies if the $filelist array has an element
> # with the specified $id for index
> #
> # Returns true or false
> #
> function download_id_is_valid($id, $filelist) {
> if (!$filelist) return false;
> if (!isset($filelist[$id])) return false;
> return true;
> }
>
> ######## download_file_is_valid($name)
> # verifies if the $name is valid for download
> #
> # Returns true or false
> #
> function download_file_is_valid($name) {
> clearstatcache();
> if (!is_file($name)) return false;
> return preg_match('/(?:jpg|png|jpeg|gif|bmp)$/', $name);
> }
>
> ######## file_list($d)
> # builds an array with all valid files in the
> # $d directory
> #
> # Returns the array with the file names
> # or false if no valid files found
> # Also returns false if the directory could not be read
> #
> function file_list($d) {
> clearstatcache();
> if (!is_dir($d)) return false;
> $dh = opendir($d);
> if (!$dh) return false;
> $retval = array();
> while (($f = readdir($dh)) !== false) {
> if (download_file_is_valid($d . '/' . $f)) {
> $retval[] = $f;
> }
> }
> return (count($retval) ? $retval : false);
> }
>
> ######## send_file_by_id($id, $filelist, $d)
> # sends the file $filelist[$id] from the directory $d
> # to the client
> #
> # Returns false if the file to send is invalid
> #
> function send_file_by_id($id, $filelist, $d) {
> if (!download_id_is_valid($id, $filelist)) return false;
> header('Content-Type: application/octet-stream');
> header('Content-Disposition: attachment; filename="' .
> rawurlencode($filelist[$id]) .
> '"');
> readfile($d . '/' . $filelist[$id]);
> return true;
> }
> ?>
>
> And I'd use like this:
>
> <?php
> require 'file_download.inc.php';
>
> ### some constants
> define('DOWNLOAD_DIRECTORY', '.');
> define('EMAIL_ADMIN', 'admin@example.com');
>
> # if the directory contents change between requests
> # the file sent to the client and the file requested may
> # be different. To avoid that, the file list is saved
> # in a session variable.
> session_start();
> if (!isset($_SESSION['files'])) {
> $_SESSION['files'] = file_list(DOWNLOAD_DIRECTORY);
> }
>
> # If the request is for a valid file, send the
> # file (and mail the admin) and exit.
> if (isset($_GET['id']) && download_id_is_valid($_GET['id'], $_SESSION['files'])) {
> if (send_file_by_id($_GET['id'], $_SESSION['files'], DOWNLOAD_DIRECTORY)) {
> mail(EMAIL_ADMIN, 'downloads', 'file sent');
> exit();
> }
> }
>
> # display file list
> foreach ($_SESSION['files'] as $k=>$f) {
> echo '<a href="dl.php?id=', $k, '">', $f, "</a><br>\n";
> }
> ?>
>
Wow. thankyou so much, I will try putting it into use and let you know
how I go.
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