Try this please.
$handle->allowed = array(
"application/arj",
"application/download",
"application/gnutar",
"application/rar",
"application/vnd.rar",
"application/x-bzip",
"application/x-bzip2",
"application/x-compressed",
"application/x-gzip",
"application/x-rar-compressed",
"application/x-unknown",
"application/x-zip-compressed",
"application/x-zip",
"application/zip",
"multipart/x-gzip",
"multipart/x-zip",
);