Xpath Query Won't Return Results

Question

I'm trying to return some results from an Xpath query but it won't select the elements correctly. I'm using the following code:

public function getTrustPilotReviews($amount)
{
    $trustPilotUrl = 'https://www.trustpilot.co.uk/review/purplegriffon.com';
    $html5 = new HTML5;
    $document = $html5->loadHtml(file_get_contents($trustPilotUrl));
    $document->validateOnParse = true;
    $xpath = new DOMXpath($document);
    $reviewsDomNodeList = $xpath->query('//div[@id="reviews-container"]//div[@itemprop="review"]');
    $reviews = new Collection;

    foreach ($reviewsDomNodeList as $key => $reviewDomElement)
    {
        $xpath = new DOMXpath($reviewDomElement->ownerDocument);

        if ((int) $xpath->query('//*[@itemprop="ratingValue"]')->item($key)->getAttribute('content') >= 4)
        {
            $review = [
                'title'     => 'Test',
                'author'    => $xpath->query('//*[@itemprop="author"]')->item($key)->nodeValue,
                'date'      => $xpath->query('//*[@class="ndate"]')->item($key)->nodeValue,
                'rating'    => $xpath->query('//*[@itemprop="ratingValue"]')->item($key)->nodeValue,
                'body'      => $xpath->query('//*[@itemprop="reviewBody"]')->item($key)->nodeValue,
            ];

            $reviews->add((object) $review);
        }
    }

    return $reviews->take($amount);
}

This code won't return anything:

//div[@id="reviews-container"]//div[@itemprop="review"]

But if I change it to:

//*[@id="reviews-container"]//*[@itemprop="review"]

It partially works but does not return the correct results.

Answer 1

Thanks to Viper-7, biberu and salathe in the ##php IRC I have this working now using:

public function getTrustPilotReviews($amount)
{
    $context = stream_context_create(array('ssl' => array('verify_peer' => false)));

    $url = 'https://www.trustpilot.co.uk/review/purplegriffon.com';
    $data = file_get_contents($url, false, $context);

    libxml_use_internal_errors(true);

    $doc = new \DOMDocument();
    $doc->loadHTML($data);

    $xpath = new DOMXpath($doc);

    $reviews = new Collection;

    foreach($xpath->query('//div[@id="reviews-container"]/div[@itemprop="review"]') as $node)
    {
        $xpath = new DOMXpath($doc);
        $rating = $xpath->query('.//*[@itemprop="ratingValue"]', $node)->item(0)->getAttribute('content');

        if ($rating >= 4)
        {
            $review = [
                'title'     => $xpath->evaluate('normalize-space(descendant::*[@itemprop="headline"]/a)', $node),
                'author'    => $xpath->evaluate('normalize-space(descendant::*[@itemprop="author"])', $node),
                'date'      => $xpath->evaluate('normalize-space(descendant::*[@class="ndate"])', $node),
                'rating'    => $xpath->evaluate('number(descendant::*[@itemprop="ratingValue"]/@content)', $node),
                'body'      => $xpath->evaluate('normalize-space(descendant::*[@itemprop="reviewBody"])', $node),
            ];

            $reviews->add((object) $review);
        }
    }

    return $reviews->take($amount);
}