php - 如何使用简单的 HTML DOM 解析器获取 <a> 标签中的 url？

Question

<ul id="PrList" class="v2">
    <li class="tools">

    </li>
    <li class="firstRow">
        <div class="i">
            <a href="www.google.com" title="Google" class="nC">
                <img src="something">
            </a>
        </div>
    </li>
</ul>

如何获取 href <div class="i"> 中的属性？

我试过了-

$html = file_get_html($link);
$urls = [];
foreach($html->find('.i') as $element) {
   $url = $element->find('.nC')->href;
   if (!in_array($url, $urls)) {
       echo $url . "<br/>";
       $urls[] = $url;
   }
}

但我收到一个错误:-

Notice: Trying to get property of non-object

我尝试过:-

$html = file_get_html($link);
$html = $html->find('div.i');
$html -> find('a',0)->href; 
$echo $html;

但我再次收到错误:-

Fatal error: Call to a member function find() on array

Answer 1

你需要像下面这样做:-

$html = file_get_html($link);
$urls = [];
foreach($html->find('.i a') as $element) {
   $url = $element->href;
   if (!in_array($url, $urls)) {
       echo $url . "<br/>";
       $urls[] = $url;
   }
}
echo "<pre/>";print_r($urls);