Opening downloaded zip file creates cpgz file?

Question

If I make the url for a zip file the href of a link and click the link, my zip file gets downloaded and opening it gets the contents as I expect.

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Answer 1

The PHP documentation for readfile says that it will output the contents of a file and return an int.

So your code, echo readfile("$archive");, will echo $archive (btw, the double quotes are meaningless here; you should remove them), and THEN output the int that is being returned. That is, your line should be: readfile($archive);

Also, you should be using a local path (not an http:// link) to the archive.

Altogether:

if($yesCanDownload){
    $archive='/path/to/my-archive.zip';
    header("Content-Type: application/zip");
    header("Content-Disposition: attachment; filename=".basename($archive));
    header("Content-Length: ".filesize($archive));
    ob_clean();
    flush();
    readfile($archive);
}

Lastly, if that does not work, make sure filesize($archive) is returning the accurate length of the file.