# disable direct access to .htaccess

<Files .htaccess>
 order allow,deny
 deny from all
</Files>

# disable direct access to other files

<FilesMatch "\.(htaccess|htpasswd|ini|phps|fla|psd|log|sh)$">
 Order Allow,Deny
 Deny from all
</FilesMatch>

# cache images and flash content for one month

<FilesMatch ".(flv|gif|jpg|jpeg|png|ico|swf)$">
Header set Cache-Control "max-age=2592000"
</FilesMatch>

# cache text, css, and javascript files for one week

<FilesMatch ".(js|css|pdf|txt)$">
Header set Cache-Control "max-age=604800"
</FilesMatch>

# cache html and htm files for one day

<FilesMatch ".(html|htm)$">
Header set Cache-Control "max-age=43200"
</FilesMatch>

# enable symbolic links
Options +FollowSymLinks

# lets use some rewrites

RewriteEngine On

# remove www

RewriteCond %{HTTP_HOST} ^www\.(domain\.com)$ [NC]
RewriteRule ^(.*)$ http://%1/$1 [R=301,L]

# treat .php as .html
# example: /downloads/files.php will work as /downloads/files.html

RewriteCond %{SCRIPT_FILENAME} !-f
RewriteCond %{REQUEST_URI} ^(/.+\.)html$ [NC]
RewriteCond %{DOCUMENT_ROOT}%1php -f
RewriteRule \.html$ %1php [NC,QSA,L]

# images on the root.
# example /images/chicago.jpg will work as /chicago.jpg

RewriteCond %{DOCUMENT_ROOT}/images%{REQUEST_URI} -f [OR]
RewriteCond %{DOCUMENT_ROOT}/images%{REQUEST_URI} -d
RewriteRule !^images(/.*)?$ /images%{REQUEST_URI} [QSA,L]

# sub domains on the fly

RewriteCond %{HTTP_HOST} !^(www\.)?domain\.com$ [NC]
RewriteCond %{HTTP_HOST} ^(.*\.)?([^\.]+)\.domain\.com$ [NC]
RewriteCond %{DOCUMENT_ROOT}/subs/%2%{REQUEST_URI}/ -d
RewriteRule [^/]$ http://%2.domain.com%{REQUEST_URI}/ [R=301,L]
RewriteCond %{HTTP_HOST} ^.*\.([^\.]+\.domain\.com)$ [NC]
RewriteRule ^(.*)$ http://%1/$1 [R=301,L]
RewriteCond %{HTTP_HOST} !^(www\.)?domain\.com$ [NC]
RewriteCond %{HTTP_HOST} ^([^\.]+)\.domain\.com$ [NC]
RewriteCond %1:::%{REQUEST_URI} !^(.+):::/subs/\1(/.*)?$ [NC]
RewriteCond %{DOCUMENT_ROOT}/subs/%1/ -d
RewriteRule ^(.*)$ /subs/%1/$1 [QSA,L]