Topic Tag: Controlling access to admin function

add_action( 'admin_init', 'restrict_admin_with_redirect', 1 );
function restrict_admin_with_redirect() {
  $user = wp_get_current_user();
    $roles = $user->roles;
    $role = array_shift($roles);
    if ( $role == 'hide-from-role-slug' && ( ! defined( 'DOING_AJAX' ) || ! DOING_AJAX ) ) {
        wp_redirect( site_url() );
        exit;
    }
}

add_filter('show_admin_bar', 'hide_for_roles_func');
function hide_for_roles_func(){
  if( is_user_logged_in() ){
    $user = wp_get_current_user();
    $roles = $user->roles;
    $role = array_shift($roles);
    if( $role == 'hide-from-role-slug' ){
        return false;
    } else {
      return user_can( $user, 'manage_options');
    }
  }
  return false;
 
}