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I did that. I changed all my pages to php but my site is indexed in Google for HTML which when they land is not showing anymore because I deleted the .html files.

I need to know the right way to make google index my php pages in replace of the html.

I do not want to get penalized for dup content being that there is a about.php and about.html.

They both have the same content. I also do not want google to think the pages are gone and penalize me for missing or uncrawlable pages.

Will the SEOMoz.com team please answer this question. It is sort of important.

Ok...so the other day I went from HTML to PHP in every part of my website. I want to know the best option for me for redirecting my pages from HTML to php. I had my site scanned with SEOMoz and I was given many 404 errors which is not at all good.

I do not have any pages of my site linking to any of these html pages. All of the site links have been updated. I have checked 3 times.

I have never created a robots.txt file so I would love to get a little help with this part.

I was thinking it would be best to tell Google not to worry about these pages in the file.

I kept the pages up and I plan to remove all code with them so that no content shows up if someone visits but the issue with that is my site is already indexed as HTML.

I want to have the HTML pages redirect to the PHP without worrying that my visitors will land on my site via Google onto an HTML page.

I hope I am making sense.

What is the best advice you can give me. I need all pages to redirect to PHP.

I used an htaccess redirect from all HTML to PHP but when I get so many of them added I get an error on my site saying too many redirects.

Seriously need help.