SimpleXML访问元素- PHP - SimpleXML Accessing Elements - PHP

SimpleXML Accessing Elements - PHP

本文关键字：PHP 元素访问 SimpleXML | 更新日期: 2023-09-27

我正试图进入位于下面SOAP中的<err:Errors>。

<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/">
    <soapenv:Header/>
    <soapenv:Body>
        <soapenv:Fault>
            <faultcode>Client</faultcode>
            <faultstring>An exception has been raised as a result of client data.</faultstring>
            <detail>
                <err:Errors xmlns:err="http://www.ups.com/XMLSchema/XOLTWS/Error/v1.1">
                    <err:ErrorDetail>
                        <err:Severity>Hard</err:Severity>
                        <err:PrimaryErrorCode>
                            <err:Code>120802</err:Code>
                            <err:Description>Address Validation Error on ShipTo address</err:Description>
                        </err:PrimaryErrorCode>
                    </err:ErrorDetail>
                </err:Errors>
            </detail>
        </soapenv:Fault>
    </soapenv:Body>
</soapenv:Envelope>

这是我如何尝试做到这一点，但$fault_errors->Errors没有任何东西。

$nameSpaces = $xml->getNamespaces(true);
$soap = $xml->children($nameSpaces['soapenv']);
$fault_errors = $soap->Body->children($nameSpaces['err']);
if (isset($fault_errors->Errors)) {
    $faultCode = (string) $fault_errors->ErrorDetail->PrimaryErrorCode->Code;               
}

您可以使用XPath进行搜索:

$ns = $xml->getNamespaces(true);
$xml->registerXPathNamespace('err', $ns['err']);
$errors = $xml->xpath("//err:Errors");
echo $errors[0]->saveXML(); // prints the tree

您试图一次跳过XML中的几个步骤。->操作符和->children()方法只返回直接子，而不是任意的后代。

正如另一个答案中所述，您可以使用XPath向下跳转，但是如果您确实希望遍历，则需要注意所传递的每个节点的名称空间，并在它发生变化时再次调用->children()。

下面的代码一步一步地分解它(实时演示):

$sx = simplexml_load_string($xml);
// These are all in the "soapenv" namespace
$soap_fault = $sx->children('http://schemas.xmlsoap.org/soap/envelope/')->Body->Fault;
// These are in the (undeclared) default namespace (a mistake in the XML being sent)
echo (string)$soap_fault->children(null)->faultstring, '<br />';
$fault_detail = $soap_fault->children(null)->detail;
// These are in the "err" namespace
$inner_fault_code = (string)$fault_detail->children('http://www.ups.com/XMLSchema/XOLTWS/Error/v1.1')->Errors->ErrorDetail->PrimaryErrorCode->Code;               
echo $inner_fault_code, '<br />';

当然，你可以一次完成其中的部分或全部:

$inner_fault_code = (string)
    $sx
    ->children('http://schemas.xmlsoap.org/soap/envelope/')->Body->Fault
    ->children(null)->detail
    ->children('http://www.ups.com/XMLSchema/XOLTWS/Error/v1.1')->Errors->ErrorDetail->PrimaryErrorCode->Code;               
echo $inner_fault_code, '<br />';