failed to open stream: No such file or directory

I've been trying to move my website to cpanel and none of the pathways are working when I use "include" in php. Whenever I run the website in localhost through iis or in php's built in local host the exact same file that I'm using in cpanel works. My errors look like this: Warning: include(pageContent/header.html): failed to open stream: No such file or directory in /home//public_html/index.php on line 40 What I've tried includes: 1.Sticking the file in the same dir as the page which works. However I can't do that because some of the code depends on the structure of the files. 2.Moving the page I'm on to be before the document I'm "including" and not using "../" anymore. This did not work. I'm thinking it is a settings option but I wouldn't know where to find that since this is my first time making a website. Additionally I assume "../" still moves the directory back by one level. (I started programming last month so please be extra clear with your answers. Thank you)