Force Single Blog Max Cap WP MS

One Blog Only.php

// Special Thanks to Ashok and Tyler Postle for this code ( UNTESTED ) 

function wpms_one_blog_only($active_signup) {
  // Get an array of the current user's blogs
  $blogs = get_blogs_of_user( get_current_user_id() );
  if ($blogs["1"]) unset($blogs["1"]);
    $n = count($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');