Place the folder '_ps2020' under 'C:/xampp/htdocs/' Better place your work only under your own foldler | e.g. '_a_henry' There 3 folder under each person's folder | e.g. '_a_henry' _temp = for any script/file/folder that are currently unnecessary or useless, but do not want to delete them, place them in this folder for the possible of future referencing css = your custom '.css', or u can place '1' or very few .css script under the directory 'C:/xampp/htdocs/_ps2020/css' and name them with your name | e.g. 'henry_style.css' js = same idea as css The folder '_global' It is to store the script that need to be used or 'include/include_once' across the website | e.g. navbar, footer The folder 'account' It is to store the script that relevant to the pages of functions 'after' login The folder 'config' It is to store the backend related script, like the script to connect the database, and to check whether the user have signed in The folder 'images' No folder of 'images' is included under each person's folder, so just place any images into this folder, but please name them carefully, think about avoiding collision/crash/conflict with future images' name The folder 'libs' It is to store the external source of code/css | e.g. animate.css The folder 'php' there should be folders of 'request' and 'ajax', where it is used for generating some frontend effect or some immediate interaction with backend, where it is normally better and more convenient/efficient than just using 'js' e.g. to show specific dropdown list depending on the selection of a previous dropdown list, so let's say dropdown-list-1, selection for role, I selected 'teacher' then dropdown-list-2 will only show selection that specific for 'teacher', after grabbing the relevant data from the database