获取所有具有itemprop属性的元素 [英] Get all elements that have an attribute of itemprop

问题描述

我正在使用PHP DomDocument并尝试抓取如下所示的内容：

I'm using PHP DomDocument and trying to scrape out something that looks like this:

<div itemprop='movie'>Fight Club</div>

它也可能看起来像这样：

it could also look like this:

<span itemprop='musician'>Ozzy Osbourne</span>

我想获取所有 itemprop ='n'在页面上，然后将它们放入数组中以存储其nodevalue和关联的itemprop名称。到目前为止，我的代码如下：

I want to grab all of the itemprop='n' on the page and put them into an array to store their nodevalue, and the associated itemprop name. My code so far looks like this:

function getItemprops(){
        foreach($this->dom->getAttribute("itemprop") as $buffer) {
                $itempropList = array(
                    'theNodeValue' => $buffer->nodeValue,
                    'theItemprop'  => $buffer->getAttribute("itemprop")
                )
                return $itempropList;
        }
}

我的代码应该在以下行：

My code is supposed to get an array somewhere along the lines of:

array (
      array(
         0 =>
              "theNodeValue" => "Fight Club",
              "theItemprop"  => "movie"
         1 =>
              "theNodeValue" => "Fight Club",
              "theItemprop"  => "movie"
      )
)

不幸的是，我的代码返回致命错误：调用未定义的方法DOMDocument :: getAttribute（）。

Unfortunately, my code returns Fatal error: Call to undefined method DOMDocument::getAttribute().

所以基本上，我想选择所有 itemprop = 并将它们放入数组。

So basically, I want to select all itemprop=""'s and put them in arrays.

感谢所有帮助！

推荐答案

您需要使用XPath首先选择具有所需属性的所有节点，然后循环遍历返回的节点以获取文本值和属性值；像这样

You need to use XPath to select all nodes with your required attribute first, then loop trhough the returned nodes to get text value and attribute value; like this

$d = new DOMDocument();
$d->loadHTML($xmlsource);
$xpath = new DOMXPath($d);
$nodes = $xpath->query('//*[@itemprop]');  //this catches all elements with itemprop attribute
foreach ($nodes as $node) { 
   // do your stuff here with $node

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