    public function withAddedHeader($header, $value)
    {
        if (!$this->hasHeader($header)) {
            return $this->withHeader($header, $value);
        }

        $new = clone $this;
        $new->headers[strtolower($header)][] = $value;
        $new->headerLines[$header][] = $value;
        return $new;
    }
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.