    public function withoutHeader($header)
    {
        if (!$this->hasHeader($header)) {
            return $this;
        }

        $new = clone $this;
        $name = strtolower($header);
        unset($new->headers[$name]);

        foreach (array_keys($new->headerLines) as $key) {
            if (strtolower($key) === $name) {
                unset($new->headerLines[$key]);
            }
        }

        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.