我是 php 新手，从以下 php 代码生成的数组中提取一些字段时遇到了一个典型问题：
$html=file_get_html("http://www.flipkart.com/books/9781846467622");
$e = $html->getElementById("mprodimg-id");
echo $e;
$f = $e->find('img');
echo $f['data-src'];
在代码中应用 var_dump（$f） 后看到的输出数组 f 如下所示：
数组 ( [0] => simple_html_dom_node 对象 ( [节点类型] => 1 [标签] => 图像 [属性] => 数组 ( [错误] => img_onerror（这个）; [数据错误网址] => http://img1a.flixcart.com/img/book.jpg [高度] => 275 [宽度] => 275 [数据来源] => http://img7a.flixcart.com/img/622/9781846467622.jpg [src] => data：image/gif;base64，R0lGODlhAQABAJEAAAAAAP////Ly8v///yH5BAEAAAMALAAAAAAAAAAAAAICVAEAOw== [加载] => lzld（this） [alt] => 购买号码 [标题] => 数字 ) [子] => 数组 ( ) [节点] => 数组 ( )
我需要回显字段"data-src"的值。有人可以帮忙吗？
Firebug 看到的 html 如下，我需要从哪里抓取这个。
<div id="mprodimg-id" class="mprodimg">
<img width="275" height="275" title="Numbers" alt="Buy Numbers" onload="lzld(this)" src="data:image/gif;base64,R0lGODlhAQABAJEAAAAAAP////Ly8v///yH5BAEAAAMALAAAAAABAAEAAAICVAEAOw==" data-src="http://img7a.flixcart.com/img/622/9781846467622.jpg" data-error-url="http://img1a.flixcart.com/img/book.jpg" onerror="img_onerror(this);">
</div>
这是一个干净的工作示例：
// includes Simple HTML DOM Parser
include "simple_html_dom.php";
$url = "http://www.flipkart.com/numbers/p/9781846467622?pid=9781846467622";
//Create a DOM object
$dom = new simple_html_dom();
// Load HTML from url
$dom->load_file($url);
// Find the wanted image using the appropriate selectors
$img = $dom->find('#mprodimg-id img', 0);
// Find succeeded
if ($img){
echo $img->{'data-src'};
}
else
echo "Find function failed !";
// Clear DOM object (needed essentially when using many)
$dom->clear();
unset($dom);
OUTPUT
======
http://img7a.flixcart.com/img/622/9781846467622.jpg
现场演示