Summary: Checks for the existence of a given domain within the WordPress MU system.
Detail: The return is the blog ID of the main blog when true. Of course, since the blog ID will be 1, this makes it a boolean.
Summary: Checks for the existence of a given domain within the WordPress MU system.
Detail: The return is the blog ID of the main blog when true. Of course, since the blog ID will be 1, this makes it a boolean.