When the form is processed, you can retrieve an IO::Handle compatibile handle for a file upload field like this:

  $lightweight_fh  = $q->upload('field_name');

  # undef may be returned if it's not a valid file handle
  if (defined $lightweight_fh) {
    # Upgrade the handle to one compatible with IO::Handle:
    my $io_handle = $lightweight_fh->handle;

    open (OUTFILE,'>>','/usr/local/web/users/feedback');
    while ($bytesread = $io_handle->read($buffer,1024)) {
      print OUTFILE $buffer;
    }
  }
In a list context, upload() will return an array of filehandles. This makes it possible to process forms that use the same name for multiple upload fields.