文档根目录不是调用CSS

I do not know why this is not working. My header, footer, CSS and JS is not called when I am working in coffeeshop.php.

Mysite

I guess it is because it is not in the root folder. Therefore I made the include like this:

<?php include $_SERVER['DOCUMENT_ROOT'] . '/vouzalis/resources/includes/header.php'; ?>

<?php include $_SERVER['DOCUMENT_ROOT'] . '/vouzalis/resources/includes/navbar.php'; ?>

But is still not working?

Code

Here is where I put the full URL:

Full url

$_SERVER['DOCUMENT_ROOT'] is return folder path 

http://$_SERVER["HTTP_HOST"].$_SERVER["REQUEST_URI"]  it return server path

otherwise you can only use

<?php include '../resources/includes/header.php'; ?>
<?php include '../resources/includes/navbar.php'; ?>

try it