use strictures;
use CGI ":standard";
use HTML::Entities;

# Called https://mysite/cgi-bin/rpc.pl?args=to;the=call
my $explicitly_scalar_param = param("args");
my $the = param("the");

print header(),
    start_html("Title..."),
    h1("header"),
    div("Do something safely with",
        encode_entities($explicitly_scalar_param),
        "and",
        encode_entities($the)),
    end_html;

# Test on command line: ./rpc.pl 'args=to;the=call'