Dreamweaver CC(2017)使用<link> include在文件外部执行搜索

the question is simple. Dreamveaver 2017 is not showing any class hints under my condition.

BECAUSE: My php website structure dynamically include content from other files. CSS stylesheet and footer JS scripts are included from different files.

f.eg. family tree looks like this:

/index.php

<?php include_once("/headerscripts.php"); ?>

and

/headerscripts.php

<link rel="stylesheet" href="/css/bootstrap.css">

Hinting works fine inside the "headerscripts.php" but doesnt work inside "index.php".

And this is the issue. I want the hints show no matter of family-tree child level.

(site folder and server are configured properly - it is dynamically showing me all the info and structure)