    public function withoutHeader($header)
    {
        $normalized = strtolower($header);

        if (!isset($this->headerNames[$normalized])) {
            return $this;
        }

        $header = $this->headerNames[$normalized];

        $new = clone $this;
        unset($new->headers[$header], $new->headerNames[$normalized]);

        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.