如何在 PHP 中正确解析 SimpleXML 对象？

Question

我正在使用 CloudFusion 类来获取 Amazon.com 数据，我的代码很简单：

$items = $pas->item_search( "shoes", array( 
    "ResponseGroup" => "Small", 
    "SearchIndex" => "Blended" ));
$items = $items->body->Items;
echo "<pre>";
print_r( $items );
echo "</pre>";

这会返回以下内容：

SimpleXMLElement Object (
    [Request] => SimpleXMLElement Object
        (
            [IsValid] => True
            [ItemSearchRequest] => SimpleXMLElement Object
                (
                    [Keywords] => shoes
                    [ResponseGroup] => Small
                    [SearchIndex] => Blended
                )

        )

    [TotalResults] => 737435
    [TotalPages] => 245816
    [SearchResultsMap] => SimpleXMLElement Object
        (
            [SearchIndex] => Array
                (
                    [0] => SimpleXMLElement Object
                        (
                            [IndexName] => Kitchen
                    ....
        )

    [Item] => Array
        (
            [0] => SimpleXMLElement Object
                (
                    [ASIN] => B0001Z95QY
                    [DetailPageURL] => http://www.amazon.com/Household-Essentials-MS6030-Seasonal-Storage/dp/B0001Z95QY%3FSubscriptionId%3D0WASFFPR5B82TH4ZQB82%26tag%3Dws%26linkCode%3Dxm2%26camp%3D2025%26creative%3D165953%26creativeASIN%3DB0001Z95QY
                    [ItemLinks] => SimpleXMLElement Object
                        (
                            [ItemLink] => Array
                                (
                                    [0] => SimpleXMLElement Object
                                        (
                                            [Description] => Technical Details
                                            [URL] => http://www.amazon.com/Household-Essentials-MS6030-Seasonal-Storage/dp/tech-data/B0001Z95QY%3FSubscriptionId%3D0WASFFPR5B82TH4ZQB82%26tag%3Dws%26linkCode%3Dxm2%26camp%3D2025%26creative%3D386001%26creativeASIN%3DB0001Z95QY
                                        ) ....................
                )

            [1] => SimpleXMLElement Object
                (
                    [ASIN] => B001ACNBZ8
                    [DetailPageURL] => http://www.amazon.com/Peet-Shoe-Dryer-Boot-Original/dp/B001ACNBZ8%3FSubscriptionId%3D0WASFFPR5B82TH4ZQB82%26tag%3Dws%26linkCode%3Dxm2%26camp%3D2025%26creative%3D165953%26creativeASIN%3DB001ACNBZ8
                    [ItemLinks] => SimpleXMLElement Object
                        (...................
        )

)

我想要做的是深入到“Item”级别，然后运行 ​​foreach 来获取每个单独的条目。我尝试了 $items = $items->Item，但这仅返回第一个条目。

有什么想法吗？

Answer 1

首先，您应该避免在 SimpleXMLElement 上使用 print_r()，而只需使用 asXML() 查看 XML。这也是您应该在此处发布的内容，而不是 print_r() 的输出。

我无法破译您发布的代码，因此我会进行大胆猜测并建议您尝试以下操作：

foreach ($items->body->Items->Item as $Item)
{
}

无论如何，如果您想迭代某些内容， foreach 就是答案。