regex - Replace php extension with slash / using .htaccess -

i want rewrite php extensions .htaccess. want replace php extension slash / . example if have: http://example.com/about-us.php http://example.com/about-us/

how can make modifying piece of code:

options +followsymlinks -multiviews # turn mod_rewrite on rewriteengine on rewritebase /  # externally redirect /dir/foo.php /dir/foo rewritecond %{the_request} ^[a-z]{3,}\s([^.]+)\.php [nc] rewriterule ^ %1 [r,l,nc]  ## internally redirect /dir/foo /dir/foo.php rewritecond %{request_filename}.php -f [nc] rewriterule ^ %{request_uri}.php [l]  rewriterule .*[^/]$ $0/ [l,r=301] 

thanks all!!!

you can use:

options +followsymlinks -multiviews rewriteengine on rewritebase /  # externally redirect /dir/foo.php /dir/foo rewritecond %{the_request} ^[a-z]{3,}\s([^.]+)\.php [nc] rewriterule ^ %1/ [r,l]  ## internally redirect /dir/foo /dir/foo.php rewritecond %{request_filename}.php -f [nc] rewriterule ^(.+?)/?$ $1.php [l]