WordPress Multisite - only allow one site per user

WordPress Multisite - only allow one site per user.php

<?php

function wpms_one_blog_only($active_signup) {
	// get the array of the current user's blogs
	$blogs = get_blogs_of_user( get_current_user_id() );
	// all users may be members of blog 1 so remove it from the count, could be a "Dashboard" blog as well
	if ($blogs["1"]) unset($blogs["1"]);
	//if the user still has blogs, disable signup else continue with existing active_signup rules at SiteAdmin->Options
	$n = count($blogs);
	if(n > 0){
		$active_signup = 'none';
		echo '';
	} else {
		$active_signup = $active_signup;
	}
	return	$active_signup; // return "all", "none", "blog" or "user"
}
add_filter('wpmu_active_signup', 'wpms_one_blog_only');

Thank you for nice comment @ugotsta 😄