php代码无法在.html文件中运行

I have added php code in html file and run this file as .html extension. For this technique i have added below code in .htaccess file.

AddType application/x-httpd-php .html .htm

This whole folder is sub directory of wordpress project folder.When i am run this file in server, pop-up comes and my code file is opens in popup and it will give option to download. where i can see the whole code. What should i do to prevent to pop up box for download and run php code in html file and open as .html extension.

I show it when i execute file.

Can anyone help me what should i do?

Your php block of codes must be inside the tag

<?php 
// Your php code might not work here
 ?>
<!DOCTYPE html>
<html>
<?php 
// Your php code will work here
 ?>
<head>
    <title>Title</title>
</head>
<body>
<?php 
// Your php code will also work here
 ?>
</body>
</html>

</div>

In order to use php in .html files, you must associate them with your PHP processor in your HTTP server's config file. In Apache, that looks like this:

AddHandler application/x-httpd-php .html