Setting Last-Modified as gmdate("D, d M Y H:i:s")." GMT")

Hi

According to Google Webmaster Guidelines,

But I got a dynamic website, where all the pages originate from index.php for which I've given:

header("Cache-Control: no-store, no-cache, must-revalidate, pre-check=0, post-check=0, max-age=0");
header("Last-Modified: ".gmdate("D, d M Y H:i:s")." GMT");
header("Content-type: text/html");
header("Pragma: no-cache");

PHP:

Does sending Last-Modified as gmdate("D, d M Y H:i:s")." GMT") even if a page is not modified in the last couple of months hurt google (seo) indexing ?

Thanks

 

i think you are a joomla user like me.

i dont think that those header will help your seo.

i have removed those part of my joomla index.php file.

i suggest you to use joomla patch which is developed by joomlatwork.com

 

I didnt notice, but in W3's RFC, If-Modified-Since if different from Last-Modified.

And Im not using Joomla in this case.

 

You can also set it in the sitemap....I'm sure there are sitemap plugins for Joomla and other CMS

 

And will this override the page's header ?