This is how I do it - it's part of my regular CGI::Application framework. But you can also get Vars() from CGI.pm or CGI::Simple. Other stuff is to skip some or all fields (say when creating a CMS and you don't want it to mess up any HTML code inside). 
sub form {
    my $self = shift;
    my %params = @_;
    
    my $skip = array_to_hash($params{'skip_fields'}); # Array/ArrayRef
    
    my $q = $self->query();
    my %vars = $q->Vars();
    
    unless($params{dont_encode_fields}){
        use HTML::Entities;
    
        foreach(keys %vars){
            next if $skip->{$_}; # Don't encode if it's in skip list 
            $vars{$_} = HTML::Entities::encode_entities($vars{$_}, '<>
+&"');
        }    
    }
    
    return \%vars;
}

[download]
PS. Latter I found out about grep trick to check if variable is in the array - should change this ...
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In reply to Re^2: Removing malicious HTML entities (now with more questions!) by techcode
in thread Removing malicious HTML entities (now with more questions!) by Lawliet

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