I can't type much, but here is save from CGI.pm. As you can see, its fairly easy to adopt this to your needs very quickly (me type left hamd only)

#### Method: save
# Write values out to a filehandle in such a way that they can
# be reinitialized by the filehandle form of the new() method
####
'save' => <<'END_OF_FUNC',
sub save {
    my($self,$filehandle) = self_or_default(@_);
    $filehandle = to_filehandle($filehandle);
    my($param);
    local($,) = '';  # set print field separator back to a sane value
    local($\) = '';  # set output line separator to a sane value
    foreach $param ($self->param) {
    my($escaped_param) = escape($param);
    my($value);
    foreach $value ($self->param($param)) {
        print $filehandle "$escaped_param=",escape("$value"),"\n";
    }
    }
    foreach (keys %{$self->{'.fieldnames'}}) {
          print $filehandle ".cgifields=",escape("$_"),"\n";
    }
    print $filehandle "=\n";    # end of record
}
END_OF_FUNC
[download]

you can also look into perltie and tutorials to tie a filehandle to a scalar, but I think it'd be easier to adopt the above code.

 
___crazyinsomniac_______________________________________
Disclaimer: Don't blame. It came from inside the void
perl -e "$q=$_;map({chr unpack qq;H*;,$_}split(q;;,q*H*));print;$q/$q;"