Expires Headers

[jensen]

Been looking at optimizing websites and am trying to understand where to put this "Expire Headers" - http://www.web-caching.com/mnot_tutorial/how.html

From what I understand HTTP is done at server side not like HTML where one can code into a page.

So can I do anything to follow the suggestion to set my images to refresh say like in a week's time? Or there's nothing that can be done?

 

[AngusThermopyle]

In the .htaccess file that contains your images add something like:

<IfModule mod_expires.c>
  # Enable expirations.
  ExpiresActive On

  # Cache all files for 2 weeks after access (A).
  ExpiresDefault A1209600
  
 #  Exceptions ...

 # since .php files tend to be dynamic, do not add expirations
  <FilesMatch \.php$>
    ExpiresActive Off
  </FilesMatch>

 # specific extensions, most image types... 30 days
  <FilesMatch \.(jpg|png|gif|jpeg)$>
 
    ExpiresDefault A2592000
  </FilesMatch>
</IfModule>

 

[essellar]

(The values are in seconds, in case that wasn't clear.)

 

[jensen]

Thanks. now to work with .htaccess and maybe get my page up to speed.