To integrate custom plugins in custom themes

Hello!

I’ve created a custom theme, and I’ve my self plugins, but I need install and activate one with my theme, and I son’t know to do it, I’ve this in my functions.php (I put as example hello dolly because is very simple):

add_action(‘after_setup_theme’, ‘load_MyPlugin’);

function load_MyPlugin() {

    // if (!class_exists(‘MyPluginClass’)) {

        include_once(WP_PLUGIN_DIR  . ‘/plugins/hello-dolly/hello.php’);

        require_once($_SERVER[‘DOCUMENT_ROOT’].’/wp-admin/includes/plugin.php’);

        activate_plugin(‘hello-dolly/hello.php’);

    // }

}

This code no works…

Someone can help me?? 🙂

thanks!