php 使用 DOMDocument 按类名获取所有元素
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/15184641/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
Get all elements by class name using DOMDocument
提问by Sammy
This question seems to have been answered numerous times but i still cant seem to put the pieces together.
这个问题似乎已经回答了很多次，但我似乎仍然无法将这些碎片拼凑在一起。
I would like to get node value of every class by name. for example
我想按名称获取每个类的节点值。例如
<td class="thename"><strong>32</strong></td>
<td class="thename"><strong>12</strong></td>
i would like to grab the 32 and the 12. I assume this requires for sort of for loop but not sure exactly how to go about implementing it. Here's what i have so far
我想获取 32 和 12。我认为这需要某种 for 循环，但不确定如何实现它。这是我到目前为止所拥有的
$domain = "http://domain.com";
$dom = new DOMDocument();
$dom->loadHTMLFile($domain);
$xpath = new DomXpath($dom);
$div = $xpath->query('//*[@class="thename"]')->item(0);
$stuff = $div ->textContent;
echo($stuff);
回答by user2112300
Is this what your are looking for?
这是您要找的吗？
$result = array();
$doc = <<< HTML
<html>
<body>
<div>1
<span>2</span>
</div>
<div>3</div>
<div>4
<span class="class1"><strong>5</strong></span>
<span class="class1"><strong>6</strong></span>
<span>7</span>
</div>
</body>
</html>
HTML;
$classname = "class1";
$domdocument = new DOMDocument();
$domdocument->loadHTML($doc);
$a = new DOMXPath($domdocument);
$spans = $a->query("//*[contains(concat(' ', normalize-space(@class), ' '), ' $classname ')]");
for ($i = $spans->length - 1; $i > -1; $i--) {
$result[] = $spans->item($i)->firstChild->nodeValue;
}
echo "<pre>";
print_r($result);
exit();
回答by Naveed Khan
i simply did this in php
我只是在 php 中做了这个
$dom = new DOMDocument('1.0');
$classname = "product-name";
@$dom->loadHTMLFile("http://shophive.com/".$query);
$nodes = array();
$nodes = $dom->getElementsByTagName("div");
foreach ($nodes as $element)
{
$classy = $element->getAttribute("class");
if (strpos($classy, "product") !== false)
{
echo $classy;
echo '<br>';
}
}
