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Download a file

Posted on 2007-03-17
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Last Modified: 2008-03-06
I would like to create a download link to a file outside the web server area, for example in the /tmp/

I could create a list of the files, but I dont know how to make it downloadable.

So far, I can create this link :

<a href="get_file.php?file=$file> $file </a>

Anyone know how to code the "get_file.php" so it will download the $file?

The $file is not in the web server area, for example /tmp/test.txt

I tried it like this (see below), but it does not work:

<?php

  header("Content-type: application/octet-stream");
  header("Content-disposition: attachment; filename=$file");

  $file = $_REQUEST['file'];
 
  echo $file;
 
  if (substr($file,0,5) != '/tmp/') {
     readfile($file);
  } else {
     echo "Error reading file";
  }

?>


Thanks!
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Question by:nova2002
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1 Comment
 
LVL 49

Accepted Solution

by:
Roonaan earned 500 total points
ID: 18739659
<?php

  $file = $_REQUEST['file'];

  $file = str_replace('..', '', $file); //prevent people from entering ../../.htaccess or something

  $path = '/tmp/'. $file;

  if(is_file($file)) {
    header("Content-type: application/octet-stream");
    header("Content-disposition: attachment; filename=".basename($file));
     readfile($file);
  } else {
     echo "Error reading file";
  }
?>

Then make sure that you use a relative path as your get_file.php argument:
For /tmp/file1.pdf, it would be get_file.php?file=file1.pdf
For /tmp/sub/file2.pdf, it would be get_file.php?file=sub/file2.pdf

Hope this helps,

-r-
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