redirect all .html extensions to .php

Question

I want to update all the pages on a website to use include for the footer and header. So I have to change a lot of .html pages to .php.

So i\'m looking for a way to

Answer 1

RewriteEngine On
RewriteRule ^(.*)\.html$ $1.php [L]

If you want it to be done as a redirect instead of just a rewrite modify the [L] to [L,R]