简单的HTML DOM从标签中获取所有属性

问题描述

分为两部分问题，但也可能是一个答案。我试图从

$ pre> < div id =foo>中获取一条信息。
< div class =bar>< a data1 =xxxxdata2 =xxxxhref =http://foo.bar>内部文本< / a>
< div class =bar2>< a data3 =xxxxdata4 =xxxxhref =http://foo.bar>更多文本< / a>


这是我现在正在使用的。

  $ articles = array（）; 
 $ html = file_get_html（'http://foo.bar'）; 
 foreach（$ html-> find（'div [class = bar] a'）as $ a）{
 $ articles [] = array（$ a-> href，$ a-> ;的innerText）; 
} 
  

这样可以很好地从第一个div类中获取href和内部文本。我尝试向foreach添加$ a-> data1，但是没有起作用。

我如何抓住这些内部数据标签，同时抓住href和innertext。

还有一个很好的方法来获得两个类与一个语句？我假设我可以建立id的查找，并抓住所有的div信息。

谢谢

解决方案

要抓住所有这些属性，调查解析的元素，如下所示：

  foreach（$ html-> find（'div [class = bar] a' ）as $ a）{
 var_dump（$ a-> attr）; 
} 
  

...看看这些属性是否存在。它们似乎不是有效的HTML，所以也许解析器丢弃它们。

如果存在，你可以这样读：

  foreach（$ html-> find（'div [class = bar] a'）as $ a）{
 $ article = array $ a-> href，$ a-> innertext）; 
 if（isset（$ a-> attr ['data1']））{
 $ article ['data1'] = $ a-> attr ['data1']; 
} 
 if（isset（$ a-> attr ['data2']））{
 $ article ['data2'] = $ a-> attr ['data2'] ; 
} 
 // ... 
 $ articles [] = $ article; 
} 
  

要获得这两个类，您可以使用多个选择器，用逗号分隔：

  foreach（$ html-> find（'div [class = bar] a，div [class = bar2] a' ）as $ a）{
 ... 
  

Sort of a two part question but maybe one answers the other. I'm trying to get a piece of information out of an

<div id="foo">
<div class="bar"><a data1="xxxx" data2="xxxx" href="http://foo.bar">Inner text"</a>
<div class="bar2"><a data3="xxxx" data4="xxxx" href="http://foo.bar">more text"</a>

Here is what I'm using now.

$articles = array();
$html=file_get_html('http://foo.bar');
foreach($html->find('div[class=bar] a') as $a){
    $articles[] = array($a->href,$a->innertext);
}

This works perfectly to grab the href and the inner text from the first div class. I tried adding a $a->data1 to the foreach but that didn't work.

How do I grab those inner data tags at the same time I grab the href and innertext.

Also is there a good way to get both classes with one statement? I assume I could build the find off of the id and grab all the div information.

Thanks

解决方案

To grab all those attributes, you should before investigate the parsed element, like this:

foreach($html->find('div[class=bar] a') as $a){
  var_dump($a->attr);
}

...and see if those attributes exist. They don't seem to be valid HTML, so maybe the parser discards them.

If they exist, you can read them like this:

foreach($html->find('div[class=bar] a') as $a){
  $article = array($a->href, $a->innertext);
  if (isset($a->attr['data1'])) {
    $article['data1'] = $a->attr['data1'];
  }
  if (isset($a->attr['data2'])) {
    $article['data2'] = $a->attr['data2'];
  }
  //...
  $articles[] = $article;
}

To get both classes you can use a multiple selector, separated by a comma:

foreach($html->find('div[class=bar] a, div[class=bar2] a') as $a){
...

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