The index page is in PHP, and I am about to create additional pages. Wondering whether they should be in PHP or HTML?
If the file is created in PHP, it would have the benefit of calling other files(like header.php in which I intend to use the google analytics and other code) by using the following code:
<?php include 'header.php'; ?>
The benefit is that the browser will cache it.
If created in HTML, the code may have to be input in each page individually and might increase the page load speed.
Is all this right?
And will there be any adverse SEO effects for using PHP?