    public function addSupportedBrand($name, $expression)
    {
        $known_brands = array_keys($this->supported_cards);

        if (in_array($name, $known_brands)) {
            return false;
        }

        $this->supported_cards[$name] = $expression;
        return true;
    }
The software constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component.