    public function getHeader($header)
    {
        $name = strtolower($header);
        return isset($this->headers[$name]) ? $this->headers[$name] : [];
    }
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.