PHP - 解析XML(PHP - Parse XML)

 我正在尝试学习API并尝试使用亚马逊的AWSECommerceService。 使用下面的XML，我试图解析具体的值。 特别是，我想得到一个嵌套在一个嵌套中的值，例如数字。 我以为我可以用PHP SimpleXML做到这一点，但我很难做到这一点。 为什么这段代码不起作用？ 
 
<?php
$xml=simplexml_load_file("test.xml") or die("Error: Cannot create object");
echo $xml->ItemLookupResponse[0]->Offers->TotalOffers . "<br>";
?>

I am attempting to learn APIs and trying with the Amazon's AWSECommerceService. Using the XML below, I am trying to parse out specific values. In particular, I would like to get a value that is within a nest such as the number with . I thought I could do this with PHP SimpleXML but I am having a hard time doing this. Why won't this code work?
 
<?php
$xml=simplexml_load_file("test.xml") or die("Error: Cannot create object");
echo $xml->ItemLookupResponse[0]->Offers->TotalOffers . "<br>";
?>

原文：https://stackoverflow.com/questions/40519561