thumbs.db messing up my upload routine - php

Question

I'm getting the following error while uploading a zip archive.
Warning: ZipArchive::extractTo(C:\xampplite\htdocs\testsite/wp-content/themes/mytheme//styles\mytheme/Thumbs.db) [ziparchive.extractto]: failed to open stream: Permission denied in C:\xampplite\htdocs\testsite\wp-content\themes\mythem\uploader.php on line 17
The thing I can't quite figure is that I don't see a thumbs.db file in either the zip archive or the destination folder that was created (the upload still processes, I just get these errors).
The function is below, line 17 is commented...
function openZip($file_to_open) {
global $target;
$zip = new ZipArchive();
$x = $zip->open($file_to_open);
if($x === true) {
$zip->extractTo($target); //this is line 17
$zip->close();
unlink($file_to_open);
} else {
die("There was a problem. Please try again!");
}
}

Answer 1

Looks like just a warning. I would ignore it. I'm betting the error happens when it tried to overwrite the thumbs.db file in the extraction directory.
Alternatively, use getNameIndex to get a list of files, filter thumbs.db and use the second parameter of extractTo to filter the files.
http://www.php.net/manual/en/function.ziparchive-getnameindex.php
http://www.php.net/manual/en/function.ziparchive-extractto.php

Answer 2

This path is all messed up
C:\xampplite\htdocs\testsite/wp-content/themes/mytheme//styles\mytheme/Thumbs.db
I guess this might be windows issue.
can you add a line above line 17 saying
echo $file_to_open; exit;
and tell us what it says when you try to upload file?

Answer 3

Assuming that the mangled path works, then there is a thumbs.db in the destination directory (by default a hidden file), and/or your script does not have permission to write to that file/directory. Windows is very big on spitting out "permission denied" when a file is in use by another process, rather than saying "In use by process XXX".