使用php从zip文件中读取Xml文件

Question

I have a zip file which have one folder named Objects. Inside Objects folder I have one Xml file. I need to get data from that xml file using PHP.

I tried following code

$file = 'file.zip';
$path = pathinfo(realpath($file), PATHINFO_DIRNAME);
$zip = new ZipArchive;
$res = $zip->open($file);
if ($res === TRUE) {
  $zip->extractTo($path);
  $zip->close();
  echo "WOOT! $file extracted to $path";
} else {
  echo "Doh! I couldn't open $file";
}

But it returns an empty folder named Objects. The xml inside the folder is missing.

Can anybody tell me What I am missing?