Symfony\Component\DomCrawler\Crawler::sibling PHP Method

    protected function sibling($node, $siblingDir = 'nextSibling')
    {
        $nodes = array();
        do {
            if ($node !== $this->getNode(0) && $node->nodeType === 1) {
                $nodes[] = $node;
            }
        } while ($node = $node->{$siblingDir});
        return $nodes;
    }