Dancer:

     my $username = param "user";
     my $password = param "pass";
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CGI::Lite:

    $form = $cgi->parse_form_data;
    %form = $cgi->parse_form_data;

    # or

    $form = $cgi->parse_form_data ('GET', 'HEAD' or 'POST');
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Plack::Request:

    my $query     = $req->parameters;
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CGI::Minimal:

    my $form_field_value = $cgi->param('some_field_name');
[download]

But the more that one studies your website, the more one comes to the conclusion that Wordpress does everything you need. What you currently have is a chaotic mess of home rolled substitutions of antiquated technology. All the work you put in up to this point has served to teach you. Now you can move on. You would be well advised to start over and store your data in a database. Again, Wordpress does all of this for you. You can always write Perl scripts to import your current data into Wordpress documents. You would gain a lot of features, for example your audience would be able to log in and comment just like you do here.