Sample

<?php
/*
------------------------------------------------------------------
 */
    public function activateCsp() 
    {
        if (function_exists('is_multisite') && is_multisite()) {
            $blog_id = $wpdb->get_col("SELECT blog_id FROM $wpdb->blogs");
            foreach ($blog_id as $id) {
                if (switch_to_blog($id)) {
                     array('installerCsp', 'delete'); 
                } 
            }
            return;
        } else {
            array('installerCsp', 'delete');
        }
    } 
    public function init() 
    {
        //$startTime = microtime(true);
        langCsp::init();
        reqCsp::init();
        $this->_extractTables();
        $this->_extractModules();

        $this->_initModules();

        $this->_execModules();
        
        add_action('init', array($this, 'addScripts'));
        add_action('init', array($this, 'addStyles'));

        register_activation_hook(CSP_DIR. DS. CSP_MAIN_FILE, $this->activateCsp(); //See classes/install.php file
        register_deactivation_hook(CSP_DIR. DS. CSP_MAIN_FILE, array('installerCsp', 'delete'));
        
        add_action('admin_notices', array('errorsCsp', 'displayOnAdmin'));

        //$operationTime = microtime(true) - $startTime;
    }
/*
------------------------------------------------------------------
 */
?>