I can't see a php include page

Question

I have an included php page into index.html.

<?php include "inc/header.php";?>

Dreamveawer cs5 is configured for viewing via wamp server.
On f12 I can't see this included file (only index.html is viewed, without includes)
If I open header.php itself - f12 - works well.
What could be the reason, please.

Answer 1

index.html is an HTML file, so PHP won't be parsed. Name the file index.php instead.

Answer 2

It's likely that the file cannot be located. I suspect if you change include to require , you will see a relevant error message. You need to either change the path you are trying to include, or change your include_path variable:

set_include_path("/path/to/your/lib/" . DIRECTORY_SEPERATOR . get_include_path());

edit As commenters noted elsewhere, this only applies if your main file is being interpreted through PHP.