Why cannot I display html files that contain PHP files uploaded to the server? What should I do?

Html files include PHP files that cannot be displayed after being uploaded to the server ?? I have created two files. one is an HTML file, the other is a PHP file, and the content of the two files is the same. Why does php display normally? only ceshi123 does not display PHP code in html! Can html directly reference PHP? Results of two files uploaded to the server: the http://www.h html file contains PHP files uploaded to the server cannot be displayed after ??
I have created two files. one is an HTML file, the other is a PHP file, and the content of the two files is the same.
Why does php display normally? only ceshi123 does not display PHP code in html!
Can html directly reference PHP?
The result of uploading two files to the server:
Http://www.hu0010.com/index.html
Http://www.hu0010.com/index.php

It is displayed on my local machine. my local configuration is apache2.2.21 php5.4 orc4 mysql 5.5.18 phpmyadmin 3.2.5.
Server Configuration: Microsoft-IIS/6.0 PHP Version 5.2.17 mysql 5.1.57-community phpmyadmin 3.3.10

Content:




Xtep life




Test ceshi123
Include ("conn. php ");
Echo "hello world! ";
Phpinfo ();
?>




------ Solution --------------------
Can html directly reference PHP?
The opposite!
Php can directly reference html.