简单的HTML DOM解析器 - 找到另一个类

Question

我有这样的HTML脚本内部类：

<div class="find-this">I do not need this</div> 

<div class="content"> 
    <div class="find-this">I need this</div> 
</div> 
<div class="content"> 
    <div class="find-this">I need this</div> 
    <div class="find-this">I need this as well</div> 
</div> 

到目前为止，我有这样的：

foreach($html->find('div[class=content]') as $key => $element) : 
     $result = $html->find('div[class=find-this]', $key)->innertext; 
     echo $result; 
endforeach; 

如何找到find-this类里面不知道有多少人在所需的班级内，有多少人在外面？谢谢。

Answer 1

XPath可能是你正在寻找的。通过这个代码，你只能得到你需要的三个节点。

/* Creates a new DomDocument object */ 
$dom = new DomDocument; 
/* Load the HTML */ 
$dom->loadHTMLFile("test.html"); 
/* Create a new XPath object */ 
$xpath = new DomXPath($dom); 
/* Query all <divs> with the class name */ 
$nodes = $xpath->query("//div[@class='content']//div[@class='find-this']"); 
/* Set HTTP response header to plain text for debugging output */ 
header("Content-type: text/plain"); 
/* Traverse the DOMNodeList object to output each DomNode's nodeValue */ 
foreach ($nodes as $i => $node) { 
    echo "Node($i): ", $node->nodeValue, "\n"; 
} 

注：我根据我的回答this other related answer。