php中xml的解析

Question

<aws:TrafficHistoryResponse xmlns:aws="http://alexa.amazonaws.com/doc/2005-10-05/">
<aws:Response xmlns:aws="http://awis.amazonaws.com/doc/2005-07-11">
<aws:OperationRequest>
<aws:RequestId>0effb937-80d1-431d-80c2-95a883de1040</aws:RequestId>
</aws:OperationRequest>
<aws:TrafficHistoryResult>
<aws:Alexa>
<aws:TrafficHistory>
<aws:Range>2</aws:Range>
<aws:Site>http://xeler8.com/</aws:Site>
<aws:Start>2016-03-01</aws:Start>
<aws:HistoricalData>
<aws:Data>
<aws:Date>2016-03-01</aws:Date>
<aws:PageViews>
<aws:PerMillion>0.06</aws:PerMillion>
<aws:PerUser>1.00</aws:PerUser>
</aws:PageViews>
<aws:Rank>339328</aws:Rank>
<aws:Reach>
<aws:PerMillion>5</aws:PerMillion>
</aws:Reach>
</aws:Data>
<aws:Data>
<aws:Date>2016-03-02</aws:Date>
<aws:PageViews>
<aws:PerMillion>0.03</aws:PerMillion>
<aws:PerUser>1.00</aws:PerUser>
</aws:PageViews>
<aws:Rank>686679</aws:Rank>
<aws:Reach>
<aws:PerMillion>2</aws:PerMillion>
</aws:Reach>
</aws:Data>
</aws:HistoricalData>
</aws:TrafficHistory>
</aws:Alexa>
</aws:TrafficHistoryResult>
<aws:ResponseStatus xmlns:aws="http://alexa.amazonaws.com/doc/2005-10-05/">
<aws:StatusCode>Success</aws:StatusCode>
</aws:ResponseStatus>
</aws:Response>

这是我想在php中解析的响应，希望获取Rank节点的值。

$xml = new SimpleXMLElement($response,null,false,
                            'http://awis.amazonaws.com/doc/2005-07-11');
echo $xml->TrafficHistoryResponse->Response->TrafficHistoryResult->Alexa->TrafficHistory->HistoricalData->Data->Rank;

使用此方法，但无法获得数据获取错误的

PHP注意:在第100行的/home/ras-al/下载/urlinfo.php中尝试获取非对象的属性

Answer 1

首先，您的XML文档在结束时缺少了关闭的aws:TrafficHistoryResponse标记。

可以检索Rank节点的文本值，如下所示：

$xml = new SimpleXMLElement($response);
$xml->registerXPathNamespace('a', 'http://awis.amazonaws.com/doc/2005-07-11');

foreach ($xml->xpath("//a:Rank") as $rank) {
    echo $rank . PHP_EOL;
}

输出：

339328 686679

Answer 2

您的XML文件无效，请在文档末尾添加以下2行：

</aws:Response>
</aws:TrafficHistoryResponse>

诀窍是执行$response = str_replace("aws:","",$response);以避免命名空间的问题:)

在这里，完整的代码：

$response ='<aws:TrafficHistoryResponse xmlns:aws="http://alexa.amazonaws.com/doc/2005-10-05/">
        <aws:Response xmlns:aws="http://awis.amazonaws.com/doc/2005-07-11">
            <aws:OperationRequest>
                <aws:RequestId>0effb937-80d1-431d-80c2-95a883de1040</aws:RequestId>
            </aws:OperationRequest>
            <aws:TrafficHistoryResult>
                <aws:Alexa>
                    <aws:TrafficHistory>
                        <aws:Range>2</aws:Range>
                        <aws:Site>http://xeler8.com/</aws:Site>
                        <aws:Start>2016-03-01</aws:Start>
                        <aws:HistoricalData>
                            <aws:Data>
                                <aws:Date>2016-03-01</aws:Date>
                                <aws:PageViews>
                                    <aws:PerMillion>0.06</aws:PerMillion>
                                    <aws:PerUser>1.00</aws:PerUser>
                                </aws:PageViews>
                                <aws:Rank>339328</aws:Rank>
                                <aws:Reach>
                                    <aws:PerMillion>5</aws:PerMillion>
                                 </aws:Reach>
                             </aws:Data>
                            <aws:Data>
                                <aws:Date>2016-03-02</aws:Date>
                                <aws:PageViews>
                                    <aws:PerMillion>0.03</aws:PerMillion>
                                    <aws:PerUser>1.00</aws:PerUser>
                                </aws:PageViews>
                                <aws:Rank>686679</aws:Rank>
                                <aws:Reach>
                                    <aws:PerMillion>2</aws:PerMillion>
                                </aws:Reach>
                            </aws:Data>
                        </aws:HistoricalData>
                    </aws:TrafficHistory>
                </aws:Alexa>
            </aws:TrafficHistoryResult>
            <aws:ResponseStatus xmlns:aws="http://alexa.amazonaws.com/doc/2005-10-05/">
            <aws:StatusCode>Success</aws:StatusCode>
            </aws:ResponseStatus>
        </aws:Response>
</aws:TrafficHistoryResponse>';

$response = str_replace("aws:","",$response);
try { 
    $xml = new SimpleXmlElement($response);
} catch (Exception $e) { 
    echo $e; 
}
$data = $xml->xpath("//TrafficHistoryResponse/Response/TrafficHistoryResult/Alexa/TrafficHistory/HistoricalData/Data[last()]");
print_r($data[0]->Rank);