Download file corrupt. Content-type not working?

I want to allow a user to download a pdf file, the download code is below....for some odd reason even though the file is being downloaded I get an error saying that the file has been damaged on the server...Could someone help me and point out where I am making my mistake.

<php

$name = $_POST["name_first"];

    $mail = $_POST['email'];


    $number = $_POST['phone_number'];

            $email_message = "first name: {$name} email is {$mail} number is {$number} ";
            mail('fanaa@gmail.com', 'Form Response', $email_message);

                if ($mail == "" OR $name == "" OR $number == "")
                    {
                        echo "Enter valid details  ";

                    }
                    else
                    {
                        header('Content-type: application/pdf');
                        header('Content-Disposition: attachment; filename="tokina.pdf"');
                        readfile('docs/tokina.pdf');

                    开发者_如何学编程}
?>

I used this code to download pdfs:

header ("Cache-Control: must-revalidate, post-check=0, pre-check=0");
    header('Content-Type: application/octetstream');
    header("Content-Transfer-Encoding: Binary");
    header("Content-length: ".filesize($file));
    header("Content-disposition: attachment; filename=\"".basename($filename)."\"");
    readfile("$file");                
  }

This should be fine, and make sure there are no spaces or return characters (don't escape php at all is the best solution).

If you find your still having problems, open the corrupted file with notepad (there may be a php error warning inside).

Hope this helps!

Remove the headers and look at the page, do you see any error messages? If PHP outputs anything else than the actual PDF source, the file will appear to be corrupted.

header('Content-type: application/pdf');

enable PHP extension php_gettext and you are done.

try taking out the double quotes in

header('Content-type: "application/octet-stream"');

so it becomes

header('Content-type: application/octet-stream');

Maybe your content-type is not correct. try this one:

header('Content-type: application/pdf');
header('Content-Disposition: attachment; filename="downloaded.pdf"');
readfile('original.pdf');

Your PDF file tokina.pdf is either not uploaded or not in the same directory as the PHP file. That's why it's saving as "tokina.pdf.htm" - it's loading the HTML for a 404 page instead. That is why your browser/PDF viewer thinks the file is "corrupted" - because its extension is PDF but its contents are not.

Make sure the file is uploaded, and if it is, make sure readfile is pointing to the correct path. If it's not in the same folder, use a relative/absolute path, for example:

readfile('docs/tokina.pdf');

And yes, the content type should be application/pdf

Using this script

   header('Content-Type: application/force-download');
   header('Content-Disposition: attachment; filename='.$filename);
   header('Content-Transfer-Encoding: binary');
   header('Content-Length: '.filesize($filenamepath));

   readfile($filenamepath);

I had the same problem. Comparing the original file and the downloaded file with a hexadecimal editor like UltraEdit, I found some characters at the beginning of the corrupted file.

The problem was that after ?> marking end of PHP code there were line terminators several times in my code.

Remove all the line terminators after ?> and read also the forum article Downloaded Files are corrupt - Common Problem. That worked for me.

I hope that can help you.

I use

$download_path = your path (where to look for the files)
set_time_limit(0);
$file_url = $download_path . $data['link'];
header('Content-Type: application/octet-stream');
header('Content-Disposition: attachment; filename="' . basename($file_url). '"');
//then to read the file
readfile($file_url);

this usually works for me