我想删除一个贡献者角色的插件，或者只是让它不可访问。我有一个类似情况的代码：

add_filter( \'option_active_plugins\', \'disable_logged_in_plugin\' );
function disable_logged_in_plugin( $plugins ) {
    // The \'option_active_plugins\' hook occurs before any user information get generated,
    // so we need to require this file early to be able to check for logged in status
    require (ABSPATH . WPINC . \'/pluggable.php\');
    // If we are logged in, and NOT an admin...
    if ( current_user_can(\'contributor\') & !is_admin() ) {
        // Use the plugin folder and main file name here.
        // is used here as an example
           $plugins_not_needed = array (\'/metabox/meta-box.php\');
            foreach ( $plugins_not_needed as $plugin ) {
                $key = array_search( $plugin, $plugins );
                if ( false !== $key ) {
                    unset( $plugins[ $key ] );
                }
            }
       PHP            return $plugins;
    }

如果贡献者在管理区域内，我如何关闭他们的特定插件？