Some wordpress plugins doesn’t work so well on external php page outside wordpress?

I am using some php pages (outside wordpress)

The page name :

Test.php in the path (www)

I used

require_once('wp-load.php');  include('wp-config.php'); get_header(); 

The problem is that there are some plugins that doesn’t work probably in these pages, is there anyway to define these pages as a wordpress page ?