AMP_Blacklist_Sanitizer::strip_tags PHP Метод

    private function strip_tags($node, $tag_names)
    {
        foreach ($tag_names as $tag_name) {
            $elements = $node->getElementsByTagName($tag_name);
            $length = $elements->length;
            if (0 === $length) {
                continue;
            }
            for ($i = $length - 1; $i >= 0; $i--) {
                $element = $elements->item($i);
                $parent_node = $element->parentNode;
                $parent_node->removeChild($element);
                if ('body' !== $parent_node->nodeName && AMP_DOM_Utils::is_node_empty($parent_node)) {
                    $parent_node->parentNode->removeChild($parent_node);
                }
            }
        }
    }