Well, my problem is that I have many files and folders as well, and I have to include files from here and there and things went crazy !!
This is my projects folder structure:
Actually in my file addf1.php I Have :
require_once('../navbar.php');
require_once('../inc/f1.class.php');
and the navbar.php include the css & js files.
The problem is I can't handle it, the css & js files can't be loaded, I've read something about using dirname or realpath , but I don't know where I have to make the changes.
Try this
<?php
$path = $_SERVER['DOCUMENT_ROOT'];
require_once($path.'navbar.php');
require_once($path.'inc/f1.class.php');
?>
When you include a php file in another, when you open that file in your browser, all the code from the 2 files is rendered together in that one file.
So in your navbar.php file you have to include your css & js like if they are in the root.
require_once('css/bootstrap.min.css') // for css file in your navbar.php
require_once ('js') // for js file