Php, html, htm, which one?

[sobole]

I have four sites that were ranking ok with goog for most of my keywords but I didn't like the program so I switched to one that uses php ext. After a year my rankings are still junk.
Bottom line it, which extensions does goog prefer? This is rediculous.

[aakk9999]

Once you changed your extension to php, have you done page to page 301 redirect from your old extension to its php version of URL?

[tedster]

Google has absolutely no preference for any particular extension. However, changing extensions after you've already established your site puts all your pages on brand new URLs. Unless do the 301 redirects from the old version to the new, they're all starting over from scratch with Google.

[suratmedia]

Ultimately all extensions are sending content type "text/html" to the browser. So it doesn't matter.

[sobole]

Interesting. So I should do a redirect from say yoursite.com/index.html > yoursite.com/index.php This would help?

[Cyclob]

It's not only help, it's the best way you should do if you want Google to find your new page faster.

Not only the main page, if all page of your new site have the same content as the old one, I'd suggest to do the 301 to all new equivalent pages as well.