从特定 div 获取所有图像 src

Question

假设，我的 HTML 结构如下：

 <div>
      <div class="content">
           <p>This is dummy text</p>
           <p><img src="a.jpg"></p>
           <p>This is dummy text</p>
           <p><img src="b.jpg"></p>
      </div>
 </div>

我想从 .content div 获取所有图像 src。我试过了：

 <?php
 // a new dom object
 $dom = new domDocument; 

 // load the html into the object
 $dom->loadHTML("example.com/article/2345"); 

 // discard white space
 $dom->preserveWhiteSpace = false;
 //get element by class
 $finder = new DomXPath($dom);
 $classname = 'content';
 $content = $finder->query("//*[contains(@class, '$classname')]");
 foreach($content as $item){
    echo $item->nodevalue;
 }

但是，当我循环 $content 时，我什么也得不到。请帮助。

Answer 1

如下所示更改您的 XPath 查询：

// loading html content from remote url
$html = file_get_contents("http://nepalpati.com/entertainment/22577/");
@$dom->loadHTML($html);  
...
$classname = 'content';
$img_sources = [];

// getting all images within div with class "content"
$content = $finder->query("//div[@class='$classname']/p/img");
foreach ($content as $img) {
    $img_sources[] = $img->getAttribute('src');
}
...
var_dump($img_sources);
// the output:

array(2) {
  [0]=>
  string(68) "http://nepalpati.com/mediastorage/images/2072/Falgun/khole-selfi.jpg"
  [1]=>
  string(72) "http://nepalpati.com/mediastorage/images/2072/Falgun/khole-hot-selfi.jpg"
}

从特定 div 获取所有图像 src

Fetching all images src from specific div

html

php

dom

domdocument

domparser