| Аргумент | Возможный тип | Описание |
| У метода нет аргументов | ||
$query = $this->db->query("SELECT SUM(amount) AS total FROM `" . DB_PREFIX . "customer_transaction` WHERE customer_id = '" . (int)$this->customer->getId() . "' GROUP BY customer_id");
if ($query->num_rows) {
return $query->row['total'];
} else {
return 0;
}
