EN1GMA

Hello my friends,

I always had my website in .html files.
But was needed to insert some php code and I changed them to .php

My question is:
Whats the favorite SE extension? .html files or .php files? or doesn't matter?
I just want to loose my visitors and drop from SERPS.

Btw, is any way to change all .php files to html via htaccess?
If yes, is recommended? Whats the best solution?

Thank you guys!