I have a lot of SHTML pages.If I change these to PHP to add some more functionality (obviously changing stuff like includes to PHP where necessary) will this effect how search engines index my site? (most importantly Google)Will they still index the PHP files the same as the old SHTML and just as often, etc.?  Will there be any difference?Background Info:Server=IISThis is my thinking/reasoning behind this question. We have a lot of shtml pages.I think it's because Google will index them all.E.g.: If you have a file individual_page.php and essentialy this page is many pages; individual_page.php?id=39430403 then Google won't index each one right? But if I have static files, they'll index them all, right?
Will changing SHTML files to PHP change effect how search engines index my site?
seo;search engines;server side scripting
It's also possible for you to run .shtml pages as PHP pages without having to change your file extension. All you need to do is tell Apache to handle .shtml pages as PHP. The following snippet will do that for you:<FilesMatch \.shtml$>  ForceType application/x-httpd-php</FilesMatch>That way you don't have to worry about redirects or pages being reindexed because to users and search engines the URLs will be the same.Update1) Google does index pages with query strings just fine. Having them is not a bad thing at all is very common and normal. 2) How ever you are using SSI you can do it the same way in PHP so if you don't have query strings in your .shtml pages then you won't need them in your .php either.