i am using Aristotles code from Extracting HTML between comments which is working great. i can extract the data i want and print it to screen. i can also append the extracted data to the original file. However i want to rewrite the original file with the extracted data. When i open the file to write it empties the original file. below is the append which works. what can i do?

#!/usr/bin/perl -w
# turn on perl's safety features
use strict;
use diagnostics;
use HTML::TokeParser::Simple;
#define variable
my $dirname="./";
my @files=undef;
my $file=undef;
my $newcontent=undef;
opendir(DIR, $dirname) or die "can't opendir $dirname: $!";
@files = readdir(DIR);
closedir(DIR);
foreach $file (@files) {
     if($file =~ /\.html$/ && -T $file) {
        # do something with "$dirname/$file"
    my $stream = HTML::TokeParser::Simple->new($file) || die "Couldn't
+ read file $file: $!";
    print "\n\nProcessing $file\n\n";
    open FH, ">", $file or die "Error writing '$file': $!\n";
        while ( my $token = $stream->get_token ) {
                if (( $token->is_comment and $token->as_is eq '<!--Sta
+rt FULL TEXT-->') ..
            ($token->is_comment and $token->as_is eq '<!--End FULL TEX
+T-->')){ 
            $newcontent = $token->as_is; #if $token->is_text;
            print $newcontent;
            print FH $newcontent;
                } 
        } close FH; 
    }
}
exit(0);
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