<?php 

/**
 * Generate htaccess insertion code
 */
function boost_generate_htaccess($drupal_subdir, $cache_dir = 'cache', $gzip_dir = 'gz', $document_root = '%{DOCUMENT_ROOT}', $server_name = '%{SERVER_NAME}') {
$string = '';
if (empty($drupal_subdir)) {
  $string = <<<ETO
  # BOOST START
  <IfModule mod_headers.c>
    Header add Expires "Sun, 19 Nov 1978 05:00:00 GMT"
    Header add Cache-Control "store, no-cache, must-revalidate, post-check=0, pre-check=0"
  </IfModule>
  <IfModule mod_mime.c>
    AddCharset utf-8 .html
  </IfModule>
  <FilesMatch "\.(html.gz)$">
    AddEncoding x-gzip .gz
    ForceType text/html
  </FilesMatch>
  #serve file IF it exist on server
  RewriteCond %{REQUEST_FILENAME} \.\w{2,4}$
  RewriteCond %{REQUEST_FILENAME} -f
  RewriteRule .? - [L]

  #GZIP
  # root
  RewriteCond %{REQUEST_METHOD} ^GET$
  RewriteCond %{REQUEST_URI} ^/$
  RewriteCond %{QUERY_STRING} ^$
  RewriteCond %{HTTP_COOKIE} !DRUPAL_UID
  RewriteCond %{HTTP:Accept-encoding} gzip
  RewriteCond $document_root/$cache_dir/$gzip_dir/$server_name/index.html.gz -f
  RewriteRule ^(.*)$ $cache_dir/$gzip_dir/$server_name/index.html.gz [L]
  # subdir root
  RewriteCond %{REQUEST_METHOD} ^GET$
  RewriteCond %{REQUEST_URI} !(^/admin|^/cache|^/misc|^/modules|^/sites|^/system|^/themes|^/user/login)
  RewriteCond %{QUERY_STRING} ^$
  RewriteCond %{HTTP_COOKIE} !DRUPAL_UID
  RewriteCond %{HTTP:Accept-encoding} gzip
  RewriteCond $document_root/$cache_dir/$gzip_dir$server_name%{REQUEST_URI} -d
  RewriteCond $document_root/$cache_dir/$gzip_dir$server_name%{REQUEST_URI}/index.html.gz -f
  RewriteRule ^(.*)$ $cache_dir/$gzip_dir/$server_name%{REQUEST_URI}/index.html.gz [L]
  # non root
  RewriteCond %{REQUEST_METHOD} ^GET$
  RewriteCond %{REQUEST_URI} !(^/admin|^/cache|^/misc|^/modules|^/sites|^/system|^/themes|^/user/login)
  RewriteCond %{QUERY_STRING} ^$
  RewriteCond %{HTTP_COOKIE} !DRUPAL_UID
  RewriteCond %{HTTP:Accept-encoding} gzip
  RewriteCond $document_root/$cache_dir/$gzip_dir/$server_name%{REQUEST_URI}.html.gz -f
  RewriteRule ^(.*)$ $cache_dir/$gzip_dir/$server_name%{REQUEST_URI}.html.gz [L]
  # url variables
  RewriteCond %{REQUEST_METHOD} ^GET$
  RewriteCond %{REQUEST_URI} !(^/admin|^/cache|^/misc|^/modules|^/sites|^/system|^/themes|^/user/login)
  RewriteCond %{QUERY_STRING} !^$
  RewriteCond %{HTTP_COOKIE} !DRUPAL_UID
  RewriteCond %{HTTP:Accept-encoding} gzip
  RewriteCond $document_root/$cache_dir/$gzip_dir/$server_name%{REQUEST_URI}_%{QUERY_STRING}.html.gz -f
  RewriteRule ^(.*)$ $cache_dir/$gzip_dir/$server_name%{REQUEST_URI}_%{QUERY_STRING}.html.gz [L]

  #NORMAL
  # root
  RewriteCond %{REQUEST_METHOD} ^GET$
  RewriteCond %{REQUEST_URI} ^/$
  RewriteCond %{QUERY_STRING} ^$
  RewriteCond %{HTTP_COOKIE} !DRUPAL_UID
  RewriteCond $document_root/$cache_dir/$server_name/index.html -f
  RewriteRule ^(.*)$ $cache_dir/$server_name/index.html [L]
  # subdir root
  RewriteCond %{REQUEST_METHOD} ^GET$
  RewriteCond %{REQUEST_URI} !(^/admin|^/cache|^/misc|^/modules|^/sites|^/system|^/themes|^/user/login)
  RewriteCond %{QUERY_STRING} ^$
  RewriteCond %{HTTP_COOKIE} !DRUPAL_UID
  RewriteCond $document_root/$cache_dir/$server_name%{REQUEST_URI} -d
  RewriteCond $document_root/$cache_dir/$server_name%{REQUEST_URI}/index.html -f
  RewriteRule ^(.*)$ $cache_dir/$server_name%{REQUEST_URI}/index.html [L]
  # non root
  RewriteCond %{REQUEST_METHOD} ^GET$
  RewriteCond %{REQUEST_URI} !(^/admin|^/cache|^/misc|^/modules|^/sites|^/system|^/themes|^/user/login)
  RewriteCond %{QUERY_STRING} ^$
  RewriteCond %{HTTP_COOKIE} !DRUPAL_UID
  RewriteCond $document_root/$cache_dir/$server_name%{REQUEST_URI}.html -f
  RewriteRule ^(.*)$ $cache_dir/$server_name%{REQUEST_URI}.html [L]
  # url variables
  RewriteCond %{REQUEST_METHOD} ^GET$
  RewriteCond %{REQUEST_URI} !(^/admin|^/cache|^/misc|^/modules|^/sites|^/system|^/themes|^/user/login)
  RewriteCond %{QUERY_STRING} !^$
  RewriteCond %{HTTP_COOKIE} !DRUPAL_UID
  RewriteCond $document_root/$cache_dir/$server_name%{REQUEST_URI}_%{QUERY_STRING}.html -f
  RewriteRule ^(.*)$ $cache_dir/$server_name%{REQUEST_URI}_%{QUERY_STRING}.html [L]
  # BOOST END
ETO;
}
else {
  $string = <<<ETO
  # BOOST START
  <IfModule mod_headers.c>
    Header add Expires "Sun, 19 Nov 1978 05:00:00 GMT"
    Header add Cache-Control "store, no-cache, must-revalidate, post-check=0, pre-check=0"
  </IfModule>
  <IfModule mod_mime.c>
    AddCharset utf-8 .html
  </IfModule>
  <FilesMatch "\.(html.gz)$">
    AddEncoding x-gzip .gz
    ForceType text/html
  </FilesMatch>
  #serve file IF it exist on server
  RewriteCond %{REQUEST_FILENAME} \.\w{2,4}$
  RewriteCond %{REQUEST_FILENAME} -f
  RewriteRule .? - [L]

  #GZIP
  # root
  RewriteCond %{REQUEST_METHOD} ^GET$  
  RewriteCond %{REQUEST_URI} ^(/$drupal_subdir)(/)$
  RewriteCond %{QUERY_STRING} ![\=]+
  RewriteCond %{HTTP_COOKIE} !DRUPAL_UID
  RewriteCond %{HTTP:Accept-encoding} gzip
  RewriteCond $document_root/$drupal_subdir/$cache_dir/$gzip_dir/$server_name/index.html.gz -f
  RewriteRule ^(.*)$ $cache_dir/$gzip_dir/$server_name/index.html.gz [L]

  #NORMAL
  # root
  RewriteCond %{REQUEST_METHOD} ^GET$  
  RewriteCond %{REQUEST_URI} ^(/$drupal_subdir)(/)$
  RewriteCond %{QUERY_STRING} ![\=]+
  RewriteCond %{HTTP_COOKIE} !DRUPAL_UID
  RewriteCond $document_root/$drupal_subdir/$cache_dir/$server_name/index.html -f
  RewriteRule ^(.*)$ $cache_dir/$server_name/index.html [L]
  # subdir root
  RewriteCond %{REQUEST_METHOD} ^GET$
  RewriteCond %{REQUEST_URI} ^(/$drupal_subdir)(.*)$
  RewriteCond %2 !(^/admin|^/$cache_dir|^/misc|^/modules|^/sites|^/system|^/themes|^/user/login)
  RewriteCond %{QUERY_STRING} ![\=]+
  RewriteCond %{HTTP_COOKIE} !DRUPAL_UID
  RewriteCond $document_root/$drupal_subdir/$cache_dir/$server_name%2 -d
  RewriteCond $document_root/$drupal_subdir/$cache_dir/$server_name%2/index.html -f
  RewriteRule ^(.*)$ $cache_dir/$server_name%2/index.html [L]
  # non root
  RewriteCond %{REQUEST_METHOD} ^GET$
  RewriteCond %{REQUEST_URI} ^(/$drupal_subdir)(.*)$
  RewriteCond %2 !(^/admin|^/$cache_dir|^/misc|^/modules|^/sites|^/system|^/themes|^/user/login)
  RewriteCond %{QUERY_STRING} ![\=]+
  RewriteCond %{HTTP_COOKIE} !DRUPAL_UID
  RewriteCond $document_root/$drupal_subdir/$cache_dir/$server_name/%2.html -f
  RewriteRule ^(.*)$ $cache_dir/$server_name%2.html [L]
  # url variables
  RewriteCond %{REQUEST_METHOD} ^GET$
  RewriteCond %{REQUEST_URI} ^(/$drupal_subdir)(.*)$
  RewriteCond %2 !(^/admin|^/$cache_dir|^/misc|^/modules|^/sites|^/system|^/themes|^/user/login)
  RewriteCond %{QUERY_STRING} !^$
  RewriteCond %{HTTP_COOKIE} !DRUPAL_UID
  RewriteCond $document_root/$drupal_subdir/$cache_dir/$server_name%2_%{QUERY_STRING}.html -f
  RewriteRule ^(.*)$ $cache_dir/$server_name%2_%{QUERY_STRING}.html [L]
  # BOOST END
ETO;
  }
return $string;
}

echo "<pre><tt>" . boost_generate_htaccess('') . "\n\n\n\n\n\n\n" . boost_generate_htaccess('drupal') . "</tt></pre>";