.htaccess

<IfModule mod_rewrite.c>
    RewriteEngine On
    RewriteBase /
    RewriteCond %{REQUEST_FILENAME} !-f
    RewriteCond %{REQUEST_FILENAME} !-d
    RewriteRule ^(.*)$ index.php/$1 [L]
</IfModule>

<IfModule !mod_rewrite.c>
    # If we don't have mod_rewrite installed, all 404's
    # can be sent to index.php, and everything works as normal.
    # Submitted by: ElliotHaughin
    ErrorDocument 404 /index.php
</IfModule>

# BEGIN Expire headers
##<ifModule mod_expires.c>
##  ExpiresActive On
##  ExpiresDefault "access plus 600 seconds"
##  ExpiresByType image/x-icon "access plus 2592000 seconds"
##  ExpiresByType image/jpeg "access plus 2592000 seconds"
##  ExpiresByType image/png "access plus 2592000 seconds"
##  ExpiresByType image/gif "access plus 2592000 seconds"
##  ExpiresByType application/x-shockwave-flash "access plus 2592000 seconds"
##  ExpiresByType text/css "access plus 604800 seconds"
##  ExpiresByType text/javascript "access plus 216000 seconds"
##  ExpiresByType application/javascript "access plus 216000 seconds"
##  ExpiresByType application/x-javascript "access plus 216000 seconds"
##  ExpiresByType text/html "access plus 600 seconds"
##  ExpiresByType application/xhtml+xml "access plus 600 seconds"
##</ifModule>
# END Expire headers

# BEGIN Cache-Control Headers
<ifModule mod_headers.c>
  <filesMatch "\.(ico|jpe?g|png|gif)$">
    Header set Cache-Control "public"
  </filesMatch>
  <filesMatch "\.(css)$">
    Header set Cache-Control "public"
  </filesMatch>
  <filesMatch "\.(js)$">
    Header set Cache-Control "private"
  </filesMatch>
  <filesMatch "\.(x?html?|php)$">
    Header set Cache-Control "private, must-revalidate"
  </filesMatch>
</ifModule>
# END Cache-Control Headers

## EXPIRES CACHING ##
<IfModule mod_expires.c>
ExpiresActive On
ExpiresDefault "access plus 1 month"
ExpiresByType text/css "access plus 1 year"
ExpiresByType text/js "access plus 1 year"
ExpiresByType text/javascript "access plus 1 year"
ExpiresByType image/jpg "access plus 1 year"
ExpiresByType image/jpeg "access plus 1 year"
ExpiresByType image/gif "access plus 1 year"
ExpiresByType image/png "access plus 1 year"
##ExpiresByType application/pdf "access plus 1 month"
##ExpiresByType application/x-shockwave-flash "access plus 1 month"
ExpiresByType image/x-icon "access plus 1 year"
</IfModule>
## EXPIRES CACHING ##

# BEGIN Gzip compression
<ifModule mod_gzip.c>
mod_gzip_on Yes
mod_gzip_dechunk Yes
mod_gzip_item_include file .(html?|txt|css|js|php|pl)$
mod_gzip_item_include handler ^cgi-script$
mod_gzip_item_include mime ^text/.*
mod_gzip_item_include mime ^application/x-javascript.*
mod_gzip_item_exclude mime ^image/.*
mod_gzip_item_exclude rspheader ^Content-Encoding:.*gzip.*
</ifModule>
# END Gzip compression

######################
#ErrorPages
ErrorDocument 400 /error.php?400
ErrorDocument 401 /error.php?401
ErrorDocument 403 /error.php?403
ErrorDocument 404 /error.php?404
#ErrorDocument 404 /404.html
ErrorDocument 500 /error.php?500
##################################################
RewriteEngine On
RewriteRule ^avatar/([_0-9a-z-]+).png /avatar/avatar.php?user=$1
#Header unset ETag
FileETag none