currently i work on a web site that PR 3-4 (all page, 9 year old site) and the owner is going to swap the old site with new look and new URL (from .Html to .php), what can i do to keep the PR ? issit possible for me to keep the old site in the same add and new site in new folder ??? thanks
The PR won't change as long as you don't have a huge amount of downtime or a new domain. If you are getting a new domain along with this just have a 301 redirect to the new one.
let say index.htm change to index.php will be no issue ? how about product.htm change to @#$%^&.php (cause is dynamic site now) thanks