title: How to assign Multiple roles to a single user in wordpress
body: <p>I want to make a plugin which can assign multiple roles to a single user. Some say its not possible to assign multiple roles in wordpress then why wordpress has provided 'roles' in array form.
  e.g when i call roles of user it returns array</p>
  
  <pre><code>$current_user=wp_get_current_user();
  $user_roles = $current_user-&gt;roles;
  </code></pre>
  
  <p>here $user_roles will be an array return by roles.</p>
  
  <p>Is there any function through which i can assign multiple role to a single user</p>