I'm reasonably familiar with HTML, and brand new to PHP.
For now, I'm just wanting to use the PHP "include" function, but it doesn't seem to be working.
Here's a simple example of the problem:
using <?php include("includes/test.php"); ?>
Dreamhost support recommended I use that exact formatting, featuring the relative URL, but I've also tested absolute URLs as well as single ' instead of double "
You can see them all fail here: