if <TITLE> and </TITLE> are on the same line always this would work 
if(/<title>(.+)<\/title>/i){
  print $1;
  $notitle = 0;
  last;
}

[download]
As for opening the file for appending, that probably isn't what you want to do. Open the source file and a temp file. Read from the source file, then write out each line(modified/unmodified) to the temp file. unlink() the source file, and rename the temp file to the original filename. 
foreach my $file(@files){
  open(TMP, '>/tmp/temp.html') || die "tmp file open failed:$!\n";
  open(FILE, "$file") || die "source file open failed: $!\n";
  while(<FILE>){
    s/<title>(.+)<\/title>/<title>$new_title<\/title>/i;
    print TMP $_;
  }
  close(TMP);
  close(FILE);

  unlink($file);
  rename('/tmp/temp.html', $file);
}

[download]

In reply to Re: Rename html page titles by tcf22
in thread Rename html page titles by Concept99

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.