Change site from .htm to php site

Hello,
I have a site that links directly to it's own pages (all in 1 directory) via the page name suffixed by .htm or .html

I want to change the site design to match my other site, so each page has a directory, and within that an index.php file.

Is there a way to do this via .htaccess or redirects so i dont loose my page ranks, or my placement on the search engines?

Thanks

Late

 

You can use mod_rewrite to do a 301 redirect. If you place the following in a domain.com/.htaccess file, it should redirect all pages of the format
http://domain.com/*.html
to
http://domain.com/*/

Options +Indexes
Options +FollowSymlinks
RewriteEngine on
RewriteRule (.*)\.htm(l?) http://www.domain.com/$1/ [R=301,L]

Code (markup):

 

The problem is i have html and htm files.

Also i want to do this:

www.***.com/links.htm = www.***.com/links/ (file will also be a .php file)
www.***.com/history.htm = www.***.com/history/ (file will also be a .php file)

I wish i had thought about this before i did the site.

If i do use redirects, will google eventually change its reference from www.***.com/links.htm to the new one?

Thanks