PHP Force Download Causing 0 Byte Files

Question

I\'m trying to force download files from my web server using PHP. I\'m not a pro in PHP but I just can\'t seem to get around the problem of files downloading in 0 bytes in s

Answer 1

You need to specify the Content-Length header:

header("Content-Length: " . filesize($filename));

Also, you shouldn't send a Content-Transfer-Encoding header. Both of the HTTP/1.0 and HTTP/1.1 specs state that "HTTP does not use the Content-Transfer-Encoding (CTE) field of RFC 1521".

Answer 2

The file opened ok for me when I changed the directory to the file location.

$reportLocation = REPORTSLOCATION;

$curDir = getcwd();

chdir($reportLocation);

if (file_exists($filename)) {

    header('Content-Disposition: attachment; filename="' . $filename . '"');
    header('Content-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet');
    header('Content-Length: ' . filesize($filename));
    header('Content-Transfer-Encoding: binary');
    header('Cache-Control: must-revalidate');
    header('Pragma: public');

    ob_clean();
    flush();

    readfile($filename);
}
chdir($curDir);