Question

我有这样的html

<div class="panel panel-info" >
    <div class="panel-heading" style="cursor: pointer;">
        <img style="height: 10px; width: 20px;" src="images/arrow.gif" alt="arrow" />
        <b>
            Click Here  all regions.
        </b>
    </div>
  <div class="panel-heading" style="cursor: pointer;">
        <img style="height: 10px; width: 20px;" src="images/arrow.gif" alt="arrow" />
        <b>
            Click Here  all regions. 2
        </b>
    </div>
</div>
<div class="panel" >
    <div class="panel-heading" style="cursor: pointer;">
        <img style="height: 10px; width: 20px;" src="images/arrow.gif"  />
        <b>
            Click Here for3 .
        </b>
    </div>
</div>

我需要在名为class="panel panel-info"的特殊类下打印所有b标签值

如此

在php中，我正在尝试这样，但它不起作用

    $urlContent = file_get_contents('http://hi.com');
    $dom = new DOMDocument();
    $dom->loadHtml($urlContent);
    $x = new DOMXpath($dom);
    $va = $x->query('//div[@class="panel panel-info"]/b');

    foreach ($va as $te) { 
        echo $te->textContent.'</br>';
    }

Answer 1

<?php
$html = '<div class="panel panel-info" >
    <div class="panel-heading" style="cursor: pointer;">
        <img style="height: 10px; width: 20px;" src="images/arrow.gif" alt="arrow" />
        <b>
            Click Here  all regions.
        </b>
    </div>
  <div class="panel-heading" style="cursor: pointer;">
        <img style="height: 10px; width: 20px;" src="images/arrow.gif" alt="arrow" />
        <b>
            Click Here  all regions. 2
        </b>
    </div>
</div>
<div class="panel" >
    <div class="panel-heading" style="cursor: pointer;">
        <img style="height: 10px; width: 20px;" src="images/arrow.gif"  />
        <b>
            Click Here for3 .
        </b>
    </div>
</div>';
$html_dom = new DOMDocument();
@$html_dom->loadHTML($html);
$x_path = new DOMXPath($html_dom);

$nodes= $x_path->query("//div[@class='panel-heading']");

foreach ($nodes as $node)
{
  foreach ($x_path->query('b', $node) as $child) {
        echo $child->nodeValue, PHP_EOL;
    }
}
die;?>

Answer 2

您的XPath几乎在那儿，问题是当您使用...

Id

//div[@class="panel panel-info"]/b表示您希望将/b元素直接放在<b>元素下面。但是，两者之间还有另一个<div>元素。解决此问题的最常见方法是使用<div>，就像您一开始就说要在//元素下的任意位置使用<b>标签一样

<div>

Answer 3

尝试getElementsByTagName：

$urlContent = file_get_contents('http://hi.com');
$dom = new DOMDocument();
$dom->loadHtml($urlContent);

foreach ($dom->getElementsByTagName('b') as $te) { 
    echo $te->nodeValue.'<br>';
}

如何使用php dom从html类中获取所有b标签值

3 个答案: