Readability\Readability::cleanHeaders PHP Method

    public function cleanHeaders($e)
    {
        for ($headerIndex = 1; $headerIndex < 3; ++$headerIndex) {
            $headers = $e->getElementsByTagName('h' . $headerIndex);
            for ($i = $headers->length - 1; $i >= 0; --$i) {
                if ($this->getWeight($headers->item($i)) < 0 || $this->getLinkDensity($headers->item($i)) > 0.33) {
                    $headers->item($i)->parentNode->removeChild($headers->item($i));
                }
            }
        }
    }