I have xampp and I have a project that extensions are *. html and php code have my localhost php does not interpret the code and displays it as php, but I want to run as php code ex: index.html
<?php
$seccion='inicio';
require_once("idiomas.html");
require_once("configurador.html");
require_once("header_scripts_css.html");
?>
<body class="clearfix">
<header id="header">
<?php require_once("header.html"); ?>
</header>
<?php require_once("slider.html"); ?>
<div id="centro">
<?php require_once("central.html");?>
</div>
<?php require_once("footer.html"); ?>