[решено] EMS почта (расчет стоимости доставки) - Плагины оплаты и доставки

function calculateSum(&$cart) {
        
        $jshopConfig = &JSFactory::getConfig();
        if ($cart->getSum() >= ($jshopConfig->summ_null_shipping * $jshopConfig->currency_value) && $jshopConfig->summ_null_shipping > 0){
            return 0;
        }
        
        $weight_sum = $cart->getWeightProducts();
        $sh_price = $this->getPrices("desc");
        foreach ($sh_price as $sh_pr) {
            if ($weight_sum >= $sh_pr->shipping_weight_from && ($weight_sum <= $sh_pr->shipping_weight_to || $sh_pr->shipping_weight_to==0)) {
                $price = ($sh_pr->shipping_price + $sh_pr->shipping_package_price) * $jshopConfig->currency_value;
                $price = getPriceCalcParamsTax($price, $this->shipping_tax_id);
                return $price;
            }
        }
//==============================для EMS==============================
		if ($this->sh_pr_method_id == 1) //если EMS доставка первая в настройках
		{
			$user = &JFactory::getUser();
			if ($user->id)
			{
				$adv_user = &JTable::getInstance('userShop', 'jshop');
				$adv_user->load($user->id);
			} else $adv_user = &JSFactory::getUserShopGuest();
			if ($adv_user->delivery_adress)
			{
				$city = $adv_user->d_city;
			} else $city = $adv_user->city;
			$this->calculateSumEMS($price,$jshopConfig->store_city,$city,$weight_sum,$min,$max,$flag);
			if ($flag == 'ok')
			{
				$price = ($price + $this->shipping_stand_price) * $jshopConfig->currency_value;
				$price = getPriceCalcParamsTax($price, $this->shipping_tax_id);
				return $price;
				$flag = "Доставка будет стоить дополнительно ".formatprice($price)." и займет от ".$min." до ".$max." дней"; // пока не знаю как привинтить
			}
			return $flag;
		}
//==============================для EMS==============================
        $price = $this->shipping_stand_price * $jshopConfig->currency_value;
        $price = getPriceCalcParamsTax($price, $this->shipping_tax_id);
        return $price;
    }

//==============================для EMS==============================
function str_lower($string)
{
	$string = strtr($string, 'ЙЦУКЕНГШЩЗХЪФЫВАПРОЛДЖЭЯЧСМИТЬБЮЁ', 'йцукенгшщзхъфывапролджэячсмитьбюё');
	return $string;
}
function calculateSumEMS(&$ems_price,$city_from,$city_to,$weight,&$ems_min,&$ems_max,&$ems_flag)
{
	$ems_max_weigt = json_decode(file_get_contents('http://emspost.ru/api/rest/?method=ems.get.max.weight'));
	if (($weight <= 0) or ($weight > $ems_max_weigt->rsp->max_weight))
	{
		$ems_flag = 'Недопустимый вес. Максимально возможный вес: '.$ems_max_weigt->rsp->max_weight.'кг. Разделите заказ на несколько.';
		return;
	}
	$ems_locations = json_decode(file_get_contents('http://emspost.ru/api/rest?method=ems.get.locations&type=cities&plain=true'));
	$ems_locations = $ems_locations->rsp->locations;
	foreach ($ems_locations as $k => $value)
	{
		if ($this->str_lower($value->name) == $this->str_lower($city_from))
			{
				$ems_city_from = $ems_locations[$k];
				break;
			}
	}
	foreach ($ems_locations as $k => $value)
	{
		if ($this->str_lower($value->name) == $this->str_lower($city_to))
			{
				$ems_city_to = $ems_locations[$k];
				break;
			}
	}
	$ems_calculate_price = json_decode(file_get_contents('http://emspost.ru/api/rest?method=ems.calculate&from='.$ems_city_from->value.'&to='.$ems_city_to->value.'&weight='.$weight));
	$ems_flag = $ems_calculate_price->rsp->stat;
	if ($ems_flag == 'ok')
	{
		$ems_price = $ems_price + $ems_calculate_price->rsp->price;
		$ems_min = $ems_calculate_price->rsp->term->min;
		$ems_max = $ems_calculate_price->rsp->term->max;
	} else
	{
		$ems_flag = 'Ошибка расчета цены. Уточните город на странице адреса.';
		return;
	}
}
//==============================для EMS==============================

<input type = "submit" class = "button" value = "<?php print _JSHOP_NEXT ?>" />

<?php
if (is_numeric($this->shipping_methods[0]->calculeprice))
{
?><input type = "submit" class = "button" value = "<?php print _JSHOP_NEXT ?>" /><?php
} else
{
	print($this->shipping_methods[0]->calculeprice);//хочу тут еще кнопочку "назад" сделать, кто знает как?
//З.Ы. shipping_methods[0] - ноль опять же если EMS доставка первая в настройках.
}
?>