如上所述，删除添加的功能更容易。下面是一个简单的实现示例：

class MyAwesomePlugin {

  static $capabilities = array(\'a_cap\'=> true, \'another_one\'=> true, \'third_cap\'=> true);

  static $custom_roles = array(\'one_role\' => \'One Role\', \'second_role\' => \'Second Role\');

  static $core_roles = array(\'administrator\', \'editor\', \'author\');

  static function install() {
    // add custom capabilities to core roles
    $roles_obj = new WP_Roles();
    foreach (self::$core_roles as $role_name) {
      foreach ( self::$capabilities as $cap => $bool )
        if ($bool) $roles_obj->add_cap($role_name, $cap );
    }
    // add custom roles with custom capabilities
    foreach ( self::$custom_roles as $custom_role => $label)
      add_role( $custom_role, $label, self::$capabilities);
  }

  static function uninstall() {
    // remove custom roles
    foreach ( self::$custom_roles as $custom_role => $label)
      remove_role( $custom_role );
    // remove custom capabilitie from core roles
    $roles_obj = new WP_Roles();
    foreach (self::$core_roles as $role_name) {
      foreach ( self::$capabilities as $cap => $bool )
        $roles_obj->remove_cap($role_name, $cap );
    }
  }

}

register_activation_hook(__FILE__, array(\'MyAwesomePlugin\', \'install\') );
register_deactivation_hook(__FILE__, array(\'MyAwesomePlugin\', \'uninstall\'));