php force download在屏幕上显示垃圾

Question

I am trying to download a zip file from /tmp folder in Ubuntu. However when I run the Php code it shows garbage text on the browser instead of showing a download box. I tried with a simple text file and instead of showing me a download dialog box it printed its contents on the browser. Why this force-download isn't working. Below is the code.

if (file_exists($dir.$filename)) {
            header("Content-type: application/force-download");
            header("Content-Transfer-Encoding: Binary");
            header("Content-length: ".filesize($dir.$filename));
            header('Content-disposition: attachment; filename='.basename($dir.$filename));
            readfile($dir.$filename);
            exit(0);
        }

    `    

Answer 1

Well, given any browser a MIME type "application/force-download" the browser won't know what to do with it.

Since it is a zip file, the MIME type should be "application/octet-stream" or "application/zip".

if (file_exists($dir . $filename)) {
        header("Content-type: application/zip");
        header("Content-Transfer-Encoding: Binary");
        header("Content-length: " . filesize($dir . $filename));
        header('Content-disposition: attachment; filename=' . basename($dir . $filename));
        readfile($dir . $filename);
        exit(0);
    }