If I have a PHP server configured directly into HTML to run PHP

If I have a PHP server configured directly into HTML to run PHP
Change Apache to HTML to run PHP
Then I run the page directly using aaa.html
This will not make the server run worse.
------to solve the idea----------------------
In normal terms, it will be aggravated. Because the general HTML is not necessary for PHP parsing, after this change, the equivalent of ordinary static HTML will need to be scanned by PHP first, parsing (although not necessarily have PHP code)
------to solve the idea----------------------
If you set up Apache. html files, PHP must be interpreted.
And some of the HTML that does not need to be processed by PHP will be interpreted by PHP. A bit of a waste of resources, but little impact.

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