<p>This is a bad try to display text then code
<pre>#! usr/bin/perl
use strict;
use warnings;

print "Hello World!";</pre>
and then plain text again</p>

##</code><code>##

#! /usr/bin/perl

use strict;
use warnings;
use Data::Dumper;
use HTML::Parser;

my $pa = qq~ <p>This is a bad try to display text then code
<pre>#! usr/bin/perl
use strict;
use warnings;

print "Hello World!";</pre>
and then plain text again</p>~;



my $p = HTML::Parser->new();
$p->handler(start => \&start_handler,"tagname,self");

$p->parse($pa);


sub start_handler{
  my ($tag,$self) = @_;
  my $text = '';
  if($tag eq 'pre'){
    print "Pre:\n";
  }
  $self->handler(text => sub {$text .= shift},"dtext");
  $self->handler(end  => sub {my $tag = shift; print $text,"\n\n" if($tag eq 'pre' || $tag eq 'p');},"tagname");
}