If my website changes domain or protocol, the entire code base does not have to be updated. That is my desired result. More specifically, I want to add a php function to my child theme to convert all http requests to https automatically. I was given some docs to get started but I realize I have too many questions at this point. Can someone help me out?
Cheers BJ
https://codex.wordpress.org/Function_Reference/get_page_by_path
https://developer.wordpress.org/reference/functions/get_permalink/
Normally you never have to use your domain in your php code for plugins / themes. There are many functions like get_home_url() which automatically fetches the domain from configuration and is also protocol agnostic if you don't force a protocol via the third parameter $scheme.
The function get_home_url() internally uses is_ssl() and the option value for home to decide which protocol to use.
get_home_url() or get_permalink() (which internally also uses get_home_url() via home_url()) will be enough as long as they yield the url you are looking for. But that depends a lot from use case to use case, so without insight to your code we can't help more thouroughly.
Commented
Dec 20, 2016 at 0:57