    public function get($key, $default = null)
    {
        return array_key_exists($key, $this->parameters) ? $this->parameters[$key] : $default;
    }
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.