An array is a variable used to store several values.
An array is a list of items.
A function is a code block dedicated to performing a task.
Objects are variables that can contain other variables. They group related data and functions together.
I am still working through the WordPress course also. I started the third of four sections. The third section deals with installing and updated an existing WordPress site for clients. Today I cloned the client site to my desktop. I have not started making updates yet. By the end of the week I should have a child theme and custom queries completed.