Question

I am using php ZipArchive to create an zip file on-the-fly and send it back to the user. I temporarily store the zipped file in a folder above document root and then send it back with the code

header('Content-type:application/zip');
header('Content-Disposition: inline; filename="'.("file.zip").'"');
header("Content-Transfer-Encoding: binary");
header("Content-Length:".filesize($file));
$fh = fopen($file,'rb');
fpassthru($fh);

after having first issued a

$zip->close()

to ensure that that the file isn’t open. The issue I have run into is this – the stored zip file is a valid archive which I can open in Windows 7, 7Zip, WinZIP etc. However, when I send the file down with the code above it ends up with an 0xD 0xA pair at the start of the file which is enough to render it corrupt. I cannot figure out where those characters could be coming from. Is this a known bug with fopen/fpassthru? Any help would be much appreciated.

Answer 1

What does your full script look like?

Generally speaking you should remove any closing PHP tags at the end of your script files, as it’s probably output coming from the end of your script, or an included script.