Download Selected File from Directory with PHP

Question

I have a script written (below) which properly displays the contents of a specific directory and creates a radio button for each file. I would like to be able to select a file and download that file to my computer.

Is this possible by changing the "action" of the form? Or is there another script or a change I need to make to my script to accomplish this?

    <form name="myform" action="#" method="POST">



<?php
$dirPath = dir('./images');
$imgArray = array();
while (($file = $dirPath->read()) !== false)
{
  if ((substr($file, -3)=="gif") || (substr($file, -3)=="jpg") || (substr($file, -3)=="png"))
  {
     $imgArray[ ] = trim($file);
  }
}
$dirPath->close();
sort($imgArray);
$c = count($imgArray);
for($i=0; $i<$c; $i++)
{
    echo "<input type=\"radio\" name=\"group1\" value=\"" . $imgArray[$i] . "\">" . $imgArray[$i] . "<br />";
}
?>
</select>

<input type="submit" value="download">

Answer 1

I would put this at the beginning of your existing script:

if(isset($_POST['group1'])){
    $f=preg_replace('/(\.\.\/?)+/','',$_POST['group1']);
    if(file_exists('./images/'.$f)){
        header("Content-type: ".filetype('./images/'.$f));
        header('Content-disposition: attachment; filename="'.$f.'"');
        echo file_get_contents('./images/'.$f);
        exit;
    }
}

It's my preferred way of doing what Cyclone was pointing at.

Answer 2

header('Location: YOURFILEDOWNLOADURL; Content-type: application/force-download');

应该工作，还没有测试。

Answer 3

Why don't you just create a download button for every file in the directory? There seems no need to use a form for this.

Remove all form HTML and change your 'for'-loop to this and you should be fine:

foreach($imgArray as $filename)
{
    echo "<a href=\"./images/$filename\">Download '$filename'</a>";
    echo "<br/>";
}

(since this uses foreach you can also drop the line that sets $c to count($imgArray) ).

If you insist on using a form, I suggest you either:

• send the form to a parse script that reads out which file was selected, and then forwards the user to that file like how Cyclone suggests, or,

• use JavaScript to directly forward the page to the selected image when the Submit-button is pressed.

Both solutions are needlessly complicated for what you are trying to accomplish, however.