如何获得DiVs水平? [英] How To get DiVs Level?
问题描述
$html ='<html>
<head>
<title></title>
</head>
<body>
<div class="">
<div class="">
<p><strong><span style="color:#FF0000"> Content1 </span></strong></p>
<p style="text-align:center"> Content2 <img src="https://example.com/bla1.jpg"/></p>
</div>
<h2> Header </h2>
<div class=""><p><strong> Content3 </strong></p> </div>
</div>
<div class=""> Content4 </div>
<div class="">
<p> Content5 </p>
<p> Content6 </p>
<span> blah.. </span>
</div>
</body></html>';
我需要一个这样的数组:
I need to have such an array:
这意味着每个DIV(包括P)有一个子DIV还是一个父DIV?
This means whether each DIV (including P) has a child or parent DIV ?
推荐答案
您的尝试是不错的尝试，但我宁愿获取所有 p 标签，然后在 p爬上DOM节点层次结构> div 是当前 p 节点的父级.这样，您将只收集那些以 div 作为其父节点的 p 节点，而不会收集其他节点.换句话说，就像CSS选择器 div>p .
Yours is a nice attempt but I would rather prefer to get all p tags and then climb up the DOM node hierarchy if div is a parent of the current p node. This way, you would only collect those p nodes which has div as their parent and not otherwise. In other words, it is like the CSS selector div > p.
$ps = array();
$doc = new DomDocument('1.0', 'UTF-8');
$doc->loadHTML(mb_convert_encoding($HTML, 'HTML-ENTITIES', 'UTF-8'));
foreach($doc->getElementsByTagName('p') as $p){
$curr_node = $p->parentNode;
while(property_exists($curr_node,'tagName')){
if($curr_node->tagName == 'div'){
$ps[] = $p;
break;
}
$curr_node = $curr_node->parentNode;
if($curr_node === null) break;
}
}
print_r($ps);
更新#1:
要获取每个 div 的 p s，您可以递归地遍历每个 div 的所有子节点并收集所有 p s并将其添加到结果中，如下所示:
To get ps per div, you can recursively walk through all child nodes per div and collect all ps and add it to result as below:
function getPs($node,&$result){
foreach ($node->childNodes as $c_node) {
if(property_exists($c_node, 'tagName') && $c_node->tagName == 'p'){
$result[] = $c_node;
}
getPs($c_node,$result);
}
}
$ps = [];
foreach($doc->getElementsByTagName('div') as $div){
$child_ps = [];
getPs($div,$child_ps);
if(count($child_ps) > 0) $ps[] = $child_ps;
}
echo "<pre>";
print_r($ps);
更新#2:
要获取 p 节点的HTML字符串表示形式，请更改
To get the HTML string representation of the p node, change
$result[] = $c_node;
到
$result[] = $c_node->ownerDocument->saveXML( $c_node );
这篇关于如何获得DiVs水平?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
