Switching MultiSite installation from HTTP to HTTPS
There are plugins to set the site to SSL. Why not use one of them? And you do have an SSL certificate installed and active?
home-url
What’s the difference between home_url() and site_url()
You are asking two questions at once: What’s the difference between home_url() and site_url()? How do I get WordPress to return the URL root without the subdirectory where it’s installed? Here are the answers, and I confirmed with Andrew Nacin, a core developer of WordPress, as well as ran some server tests to confirm what … Read more