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> ';
$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 = $results->item(0)->nodeValue; }
在Blog提供了按类别选择元素的XPATH语法
我已经尝试过StackOverflow,在线教程的许多例子,但没有一个似乎工作.我错过了什么吗?
以下XPath查询将执行您想要的操作.只需将提供给$xpath->查询的参数替换为以下内容:
原文链接:https://www.f2er.com/php/140115.html//div[@class="review-text"]
编辑:
为了方便开发,您可以在http://www.xpathtester.com/test测试您的XPath查询在线.
EDIT2:
测试了这段代码;它工作完美.
<?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; } ?>