I have a website built in .php but we have converted it to .html by using "mod rewrite". the mod rewrite code used in .htaccess is
RewriteRule ^(.*)\.html$ $1.php"
Now the problem is my website shows up in both .php and .html.
as per my knowledge its not good for seo purpose and also it may fall in duplicate content to search engines.
so i want to keep only .html [not .php] url live on search engines and for users.
how to do that?