我试图从div中获取文本,其中class =’review-text’,通过使用具有以下 HTML(相同结构)的 PHP的DOM元素和以下代码.

但是这似乎不起作用

> HTML

$html = '
    <div class="page-wrapPEr">
        <section class="page single-review" ITemtype="http://schema.org/Review" itemscope="" itemPRop="review">
            <article class="review clearfix">
                <div class="review-content">
                    <div class="review-text" itemprop="reviewBody">
                    Outstanding ... 
                    </div>
                </div>
            </article>
        </section>
    </div>
';

> PHP代码

$classname = 'review-text';
    $dom = new DOMDocument;
    $dom->loadhtml($html);
    $xpath     = new DOMXPath($dom);
    $results = $xpath->query("//*[@class and contains(concat(' ',normalize-space(@class),' '),' $classname ')]");

    if ($results->length > 0) {
        echo $review = $results->item(0)->nodeValue;
    }

在Blog提供了按类别选择元素的XPATH语法

我已经尝试过StackOverflow,在线教程的许多例子,但没有一个似乎工作.我错过了什么吗？

//div[@class="review-text"]

<?PHP

$html = '
    <div class="page-wrapper">
        <section class="page single-review" itemtype="http://schema.org/Review" itemscope="" itemprop="review">
            <article class="review clearfix">
                <div class="review-content">
                    <div class="review-text" itemprop="reviewBody">
                    Outstanding ... 
                    </div>
                </div>
            </article>
        </section>
    </div>
';

$classname = 'review-text';
$dom = new DOMDocument;
$dom->loadHTML($html);
$xpath = new DOMXPath($dom);
$results = $xpath->query("//*[@class='" . $classname . "']");

if ($results->length > 0) {
    echo $review = $results->item(0)->nodeValue;
}

?>