从特定div

Question

假设我有以下HTML结构：

 <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，我无法得到任何东西。请帮助。

Answer 1

更改您的XPath查询，如下所示：

var purl = "http://www.othersite.com";
$.getJSON('http://whateverorigin.org/get?url=' +
    encodeURIComponent(purl) + '&callback=?',
    function (data) {
    $('#viewer').html(data.contents);
});