chamilo-lms/plugin/advanced_subscription/install.php

<?php
/* For license terms, see /license.txt */
/**
 * This script is included by main/admin/settings.lib.php and generally
 * includes things to execute in the main database (settings_current table)
 * @package chamilo.plugin.advanced_subscription
 */

/**
 * Initialization
 */

require_once dirname(__FILE__) . '/config.php';
if (!api_is_platform_admin()) {
    die ('You must have admin permissions to install plugins');
}
AdvancedSubscriptionPlugin::create()->install();