title: Search users that follows user
body: <p>I want to search users by ($_POST['search'] '"name" and "lastname"') that follows the </p>
  
  <blockquote>
    <p>"user id = 1"</p>
  </blockquote>
  
  <p>I got the table users, in users I got </p>
  
  <blockquote>
    <p>"name" and "lastname"</p>
  </blockquote>
  
  <p>And I got the table followers, in followers I got</p>
  
  <blockquote>
    <p>"follower_id" and "user_id"...</p>
  </blockquote>
  
  <p>I know that to  do it I have to use models related, but I don't know how...</p>
  
  <pre><code>//$user_id = 1 (in followers.user_id)
  //$_POST['search'] (in users.name and users.lastname)
  
  public function u_followers_search($user_id) {
  
  $followers = ...
  
  return $followers;
  
  }
  </code></pre>