Microweber\Providers\Shop\CartManager::sum PHP Method

    public function sum($return_amount = true)
    {
        $sid = $this->app->user_manager->session_id();
        $different_items = 0;
        $amount = floatval(0.0);
        $get_params = array();
        $get_params['order_completed'] = 0;
        $get_params['session_id'] = $sid;
        $get_params['no_cache'] = true;
        $sumq = $this->app->database_manager->get($this->table, $get_params);
        if (is_array($sumq)) {
            foreach ($sumq as $value) {
                $different_items = $different_items + $value['qty'];
                $amount = $amount + intval($value['qty']) * floatval($value['price']);
            }
        }
        $modify_amount = $this->app->event_manager->trigger('mw.cart.sum', $amount);
        if ($modify_amount !== null and $modify_amount !== false) {
            if (is_array($modify_amount)) {
                $pop = array_pop($modify_amount);
                if ($pop != false) {
                    $amount = $pop;
                }
            } else {
                $amount = $modify_amount;
            }
        }
        if ($return_amount == false) {
            return $different_items;
        }
        return $amount;
    }