<files archive>
  ForceType application/x-httpd-php
</files>

Options +FollowSymLinks

RewriteEngine On

RewriteRule ^sitemap_index.xml sitemap_index.php [NC]
RewriteRule ^sitemap_forums.xml sitemap_forums.php [NC]
RewriteRule ^sitemap_topics.xml sitemap_topics.php [NC]
RewriteRule ^sitemap_posts.xml sitemap_posts.php [NC]
RewriteRule ^webpage/([^/\.]+)/?$ webpage_view.php?webpage=$1 [L]