recursively replace similar lines of html with ssi and remove bogus tags given a nested directory

replace.rb

#!/usr/bin/env ruby
# encoding: UTF-8

#usage: `ruby replace.rb /path/to/target/directory`

require 'iconv'

def read_dir(dir, opts={})
  Dir.glob("#{dir}/*").each_with_object({}) do |f, h|
    if File.file?(f)
      File.open(f, "r:UTF-8") do |rf|
        puts rf.path
        if File.extname(rf) =~ /\.php/ || File.extname(rf) =~ /\.html/
          ic = Iconv.new('UTF-8//IGNORE', 'UTF-8')
          content = ic.iconv(rf.read)
          content.gsub!(/<!-- CSS Stylesheet -->(.*)<title>/m, opts[:inner_header])
          content.gsub!(/<div class="full-width network-bar">(.*)<div class="container body-shadow" id="forumsContainer">/m, opts[:header])
          content.gsub!(/<div class="full-width footer-top">.*<\/html>/m, opts[:footer])
          content.gsub!(/<br \/><div style="z-index:3" class="smallfont" align="center">Search Engine Friendly URLs by <a rel="nofollow" href="http:\/\/www.crawlability.com\/vbseo\/">vBSEO<\/a> 3.1.0<\/div>/m, "")
          content.gsub!(/<\?php ="support"; \?>/, "")
          content.gsub!(/<\?php ="prodsupport"; \?>/, "")
          content.gsub!(/<\?php ="all_old_new"; \?>/, "")
          File.open(rf, "w:UTF-8") { |wf| wf.write(content) }
        end
      end
    elsif File.directory?(f)
      h[f] = read_dir(f, opts)
    end
  end
end

inner_header = <<-EOF
<!--#include virtual="/forums/inner-head.inc" -->
<title>
EOF

header = <<-EOF
<!--#include virtual="/forums/header.inc" -->
<div class="container body-shadow" id="forumsContainer">
EOF

footer = <<-EOF
<!--#include virtual="/forums/footer.inc" -->
EOF

read_dir(ARGV[0], {inner_header: inner_header, header: header, footer: footer})