WordPress’ COOKIE_DOMAIN and Multisite with Domain Mapping

I have been managing a site with multisite and domain mapping, without the traditional plugin. Domain mapping is when you allow a multsite website like mysite.example.com to be used as the website for a different domain, like mysite.com.

The biggest problem I had was getting the admin login working on a mapped domain. This good tutoral explains how to fix that problem. Continue reading WordPress’ COOKIE_DOMAIN and Multisite with Domain Mapping