Force Download Images using PHP

Question

I am trying to download an image from website using php with the following code.

Currently it idendtify and downloads the file. but the file downloaded is not opening and it shows as corrupted. what is the issue in the below code ?

Also I am embedding this page in one of my mobile app. will it work in mobile android devices too

<?php
$file = "http://example.com/animals/1.jpg";
    // Parse Info / Get Extension
    $fsize = filesize($file);
    $path_parts = pathinfo($file);
    $ext = strtolower($path_parts["extension"]);

    // Determine Content Type
    switch ($ext) 
    {
        case "gif": $ctype="image/gif"; break;
        case "png": $ctype="image/png"; break;
        case "jpeg":
        case "jpg": $ctype="image/jpg"; break;
        default: die('Wrong Extension');
    }

    header("Pragma: public"); // required
    header("Expires: 0");
    header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
    header("Cache-Control: private", false); // required for certain browsers
    header("Content-Type: $ctype");
    header("Content-Disposition: attachment; filename=\"Test".basename($file)."\";" );
    header("Content-Transfer-Encoding: binary");
    header("Content-Length: " . $fsize);
    ob_clean();
    flush();
    readfile($file);
exit();
?>

Answer 1

You need to send data stream to browser.

header('Content-Description: File Transfer');
header('Content-Type: application/octet-stream'); // change this will work for you.
header('Content-Disposition: attachment; filename="'.basename($file).'"');
header('Expires: 0');
header('Cache-Control: must-revalidate');
header('Pragma: public');
header('Content-Length: ' . filesize($file));
readfile($file);
exit;