my $in;
$in->{'name'} = $q->param('name');
$in->{'email'} = $q->param('email');
# etc
[download]

FWIW, you don't need to know the name, param without args provides the names , Vars mangles (encodes, serializes, packs, implodes) the data, its backwards compatibility for some 1993 stuff

#!/usr/bin/perl --
use Data::Dump qw/ dd /;
use CGI;
my $q = CGI->new(q{a=b;a=c;d=e;f=g});
my %Vars = map { $_ => [ $q->param($_) ] } $q->param(); 
dd( $q );
dd( $q->Vars );
dd( \%Vars );
__END__
__END__
bless({
  ".charset"     => "ISO-8859-1",
  ".fieldnames"  => {},
  ".parameters"  => ["a", "d", "f"],
  "escape"       => 1,
  "param"        => { a => ["b", "c"], d => ["e"], f => ["g"] },
  "use_tempfile" => 1,
}, "CGI")
("a", "b\0c", "d" .. "g")
{ a => ["b", "c"], d => ["e"], f => ["g"] }



bless({
  ".charset"     => "ISO-8859-1",
  ".fieldnames"  => {},
  ".parameters"  => ["a", "d", "f"],
  "escape"       => 1,
  "param"        => { a => ["b", "c"], d => ["e"], f => ["g"] },
  "use_tempfile" => 1,
}, "CGI")
[download]

#!/usr/bin/perl --
use Data::Dump qw/ dd /;
use CGI;
my $q = CGI->new(q{a=b;a=c%00d;d=e;f=g});
my %Vars = map { $_ => [ $q->param($_) ] } $q->param();
dd( $q );
dd( $q->Vars );
dd( \%Vars );
__END__
bless({
  ".charset"     => "ISO-8859-1",
  ".fieldnames"  => {},
  ".parameters"  => ["a", "d", "f"],
  "escape"       => 1,
  "param"        => { a => ["b", "c\0d"], d => ["e"], f => ["g"] },
  "use_tempfile" => 1,
}, "CGI")
("a", "b\0c\0d", "d" .. "g")
{ a => ["b", "c\0d"], d => ["e"], f => ["g"] }
[download]

Naming things is hard :/

#~ sub CGI::fornew {
#~ sub CGI::HashVars {
#~ sub CGI::VARTS {
#~ sub CGI::old {
#~ sub CGI::wen {
#~ sub CGI::Varses {
sub CGI::Wars {
    my $q = shift;
    my %Vars = map { $_ => [ $q->param($_) ] } $q->param(); 
    return \%Vars;
}
[download]

sub CGI::AsHash {
    my $q = shift;
    my %hash;
    $hash{$_} = $q->param($_) for $q->param;
    return \%hash;
}
[download]

my $params = CGI->new->AsHash;