Benim php sayfaları bir menü eklemek istiyorum. Bu gibi:

index.php

require_once 'includes/menu.php';

dir / index.php

require_once 'includes/menu.php';

menu.php I var:

<a href='link1.php'>Link 1</a>
<a href='link2.php'>Link 2</a>
<a href='link3.php'>Link 3</a>

The problem is that the path should be different for the subdirectory and the root. How I can handle this, so that the output is link1.php for the index, and ../link1.php for the sub directories?

I found this link, but the question is not very clear, so I don´t known if is related: Change relative link paths for included content in PHP