Question

我试图从simpleXML数组中获取元素，由于某种原因我无法调用它们。

这是阵列。

Array
(
    [0] => SimpleXMLElement Object
        (
            [NameChangeIndicator] => N
            [NameChangeDate] => SimpleXMLElement Object
                (
                )

            [PreviousName] => SimpleXMLElement Object
                (
                )

            [Score] => 53
            [NumberOfSubs] => SimpleXMLElement Object
                (
                )

            [NumberOfJU] => SimpleXMLElement Object
                (
                )

            [DateLastJU] => SimpleXMLElement Object
                (
                )

            [NumberActPrincipals] => 1
            [NumberActPrincipalsJU] => SimpleXMLElement Object
                (
                )

            [LastestBankCode] => SimpleXMLElement Object
                (
                )

            [LastestBankCodeDate] => SimpleXMLElement Object
                (
                )

            [NumberRDs] => SimpleXMLElement Object
                (
                )

            [LiqIndicator] => SimpleXMLElement Object
                (
                )

            [TotEnqLast12Mth] => SimpleXMLElement Object
                (
                )

            [TotEnqLast3Mth] => SimpleXMLElement Object
                (
                )

            [RefsNoOfReferences] => SimpleXMLElement Object
                (
                )

            [RefsHighMthPurchases] => SimpleXMLElement Object
                (
                )

            [RefsHighMthPurchasesTermGiven] => SimpleXMLElement Object
                (
                )

            [RefsHighMthPurchasesTermTaken] => SimpleXMLElement Object
                (
                )

            [RefsLowMthPurchases] => SimpleXMLElement Object
                (
                )

            [RefsLowMthPurchasesTermGiven] => SimpleXMLElement Object
                (
                )

            [RefsLowMthPurchasesTermTaken] => SimpleXMLElement Object
                (
                )

            [KissNoOfSuppliers] => SimpleXMLElement Object
                (
                )

            [KissNoOfODSuppliers] => SimpleXMLElement Object
                (
                )

            [KissAmountOS] => SimpleXMLElement Object
                (
                )

            [KissAmountOD] => SimpleXMLElement Object
                (
                )

            [KissPercntage] => SimpleXMLElement Object
                (
                )

            [LatestBankCodeDesc] => SimpleXMLElement Object
                (
                )

            [HoldingCmpName] => SimpleXMLElement Object
                (
                )

        )

)

所以我正在进行以下调用以获取数组。

$new_str = htmlspecialchars_decode($str);
$new_str = str_replace('<?xml version="1.0" encoding="UTF-8"?>','',$new_str);
$xml = simplexml_load_string($new_str);
$dom = new SimpleXMLElement($new_str);
$xml_array = $dom->xpath("//*[name()='ReportSummary']");
echo "{$xml_array[0]['Score']}";

但是我无法将对象拉出阵列。我不确定阵列是否正确正在被正确地发回给我，因为如果我不解码字符串我不会得到一个数组。奇怪的是，在数组中我一直看到“SimpleXMLElement对象”，我不确定这是否正确。

任何帮助将不胜感激。

Answer 1

正如转储输出所说，SimpleXML是一种对象，而不是创建数组的方法。

这两行是写同一件事的不同方式，你只需要其中一个;在任何一种情况下，你最终得到一个SimpleXMLElement对象：

$xml = simplexml_load_string($new_str);
$xml = new SimpleXMLElement($new_str);

您看到的外部数组是保存XPath查询的结果，因为它们可以来自XML树中的任何位置。它是一个SimpleXMLElement个对象的数组。

有关如何使用SimpleXML访问数据，请参阅the basic usage page in the PHP manual。

在您的情况下，Score是文档的一个元素，因此需要使用$node->property语法进行访问。

这是您的代码的整理版本：

$new_str = htmlspecialchars_decode($str);
// Are you sure the next line is necessary? That looks like a valid XML opening to me.
$new_str = str_replace('<?xml version="1.0" encoding="UTF-8"?>','',$new_str);

$xml = simplexml_load_string($new_str);

// I think this simpler XPath expression means the same as yours, but I might be wrong
$xpath_results = $xml->xpath('//ReportSummary');

// Beware that the XPath could return no matches, in which case the following 
// would give an error. Best to check count($xpath_results) > 0 first.
echo $xpath_results[0]->Score;

Answer 2

致IMSoP：感谢您的帮助，但我不得不稍微修改一下：

$dom = new SimpleXMLElement($new_str);
$xml_array = $dom->xpath("//*[name()='ReportSummary']");
echo $xml_array[0]->Score;

从那以后我得到了正确的结果，非常感谢！

从easyXML数组中获取elemints

2 个答案: