PHP XPath-如何从结果中获取价值

Question

我有来自Ebay的Followng XML文件

<?xml version="1.0"?>
<GeteBayDetailsResponse xmlns="urn:ebay:apis:eBLBaseComponents">
    <Timestamp>2012-07-04T12:02:14.541Z</Timestamp>
    <Ack>Success</Ack>
    <Version>779</Version>
    <Build>E779_INTL_BUNDLED_14986004_R1</Build>
    <SiteDetails>
        <Site>US</Site>
        <SiteID>0</SiteID>
        <DetailVersion>1</DetailVersion>
        <UpdateTime>2009-07-09T10:48:17.000Z</UpdateTime>
    </SiteDetails>
    <SiteDetails>
        <Site>Canada</Site>
        <SiteID>2</SiteID>
        <DetailVersion>1</DetailVersion>
        <UpdateTime>2009-07-09T10:48:17.000Z</UpdateTime>
    </SiteDetails>
    <SiteDetails>
        <Site>UK</Site>
        <SiteID>3</SiteID>
        <DetailVersion>1</DetailVersion>
        <UpdateTime>2009-07-09T10:48:17.000Z</UpdateTime>
    </SiteDetails>
    <SiteDetails>
        <Site>Germany</Site>
        <SiteID>77</SiteID>
        <DetailVersion>1</DetailVersion>
        <UpdateTime>2009-07-09T10:48:17.000Z</UpdateTime>
    </SiteDetails>
    <SiteDetails>
        <Site>Australia</Site>
        <SiteID>15</SiteID>
        <DetailVersion>1</DetailVersion>
        <UpdateTime>2009-07-09T10:48:17.000Z</UpdateTime>
    </SiteDetails>
    <SiteDetails>
        <Site>France</Site>
        <SiteID>71</SiteID>
        <DetailVersion>1</DetailVersion>
        <UpdateTime>2009-07-09T10:48:17.000Z</UpdateTime>
    </SiteDetails>
    <SiteDetails>
        <Site>eBayMotors</Site>
        <SiteID>100</SiteID>
        <DetailVersion>1</DetailVersion>
        <UpdateTime>2009-07-09T10:48:17.000Z</UpdateTime>
    </SiteDetails>
    <SiteDetails>
        <Site>Italy</Site>
        <SiteID>101</SiteID>
        <DetailVersion>1</DetailVersion>
        <UpdateTime>2009-07-09T10:48:17.000Z</UpdateTime>
    </SiteDetails>
    <SiteDetails>
        <Site>Netherlands</Site>
        <SiteID>146</SiteID>
        <DetailVersion>1</DetailVersion>
        <UpdateTime>2009-07-09T10:48:17.000Z</UpdateTime>
    </SiteDetails>
    <SiteDetails>
        <Site>Spain</Site>
        <SiteID>186</SiteID>
        <DetailVersion>1</DetailVersion>
        <UpdateTime>2009-07-09T10:48:17.000Z</UpdateTime>
    </SiteDetails>
    <SiteDetails>
        <Site>India</Site>
        <SiteID>203</SiteID>
        <DetailVersion>1</DetailVersion>
        <UpdateTime>2009-07-09T10:48:17.000Z</UpdateTime>
    </SiteDetails>
    <SiteDetails>
        <Site>HongKong</Site>
        <SiteID>201</SiteID>
        <DetailVersion>1</DetailVersion>
        <UpdateTime>2009-07-09T10:48:17.000Z</UpdateTime>
    </SiteDetails>
    <SiteDetails>
        <Site>Singapore</Site>
        <SiteID>216</SiteID>
        <DetailVersion>1</DetailVersion>
        <UpdateTime>2009-07-09T10:48:17.000Z</UpdateTime>
    </SiteDetails>
    <SiteDetails>
        <Site>Malaysia</Site>
        <SiteID>207</SiteID>
        <DetailVersion>1</DetailVersion>
        <UpdateTime>2009-07-09T10:48:17.000Z</UpdateTime>
    </SiteDetails>
    <SiteDetails>
        <Site>Philippines</Site>
        <SiteID>211</SiteID>
        <DetailVersion>1</DetailVersion>
        <UpdateTime>2009-07-09T10:48:17.000Z</UpdateTime>
    </SiteDetails>
    <SiteDetails>
        <Site>CanadaFrench</Site>
        <SiteID>210</SiteID>
        <DetailVersion>1</DetailVersion>
        <UpdateTime>2009-07-09T10:48:17.000Z</UpdateTime>
    </SiteDetails>
    <SiteDetails>
        <Site>Poland</Site>
        <SiteID>212</SiteID>
        <DetailVersion>1</DetailVersion>
        <UpdateTime>2009-07-09T10:48:17.000Z</UpdateTime>
    </SiteDetails>
    <SiteDetails>
        <Site>Belgium_Dutch</Site>
        <SiteID>123</SiteID>
        <DetailVersion>1</DetailVersion>
        <UpdateTime>2009-07-09T10:48:17.000Z</UpdateTime>
    </SiteDetails>
    <SiteDetails>
        <Site>Belgium_French</Site>
        <SiteID>23</SiteID>
        <DetailVersion>1</DetailVersion>
        <UpdateTime>2009-07-09T10:48:17.000Z</UpdateTime>
    </SiteDetails>
    <SiteDetails>
        <Site>Austria</Site>
        <SiteID>16</SiteID>
        <DetailVersion>1</DetailVersion>
        <UpdateTime>2009-07-09T10:48:17.000Z</UpdateTime>
    </SiteDetails>
    <SiteDetails>
        <Site>Switzerland</Site>
        <SiteID>193</SiteID>
        <DetailVersion>1</DetailVersion>
        <UpdateTime>2009-07-09T10:48:17.000Z</UpdateTime>
    </SiteDetails>
    <SiteDetails>
        <Site>Ireland</Site>
        <SiteID>205</SiteID>
        <DetailVersion>1</DetailVersion>
        <UpdateTime>2009-07-09T10:48:17.000Z</UpdateTime>
    </SiteDetails>
    <UpdateTime>2009-07-09T10:48:17.000Z</UpdateTime>
</GeteBayDetailsResponse>

我需要获取节点SiteID的值，其中节点Site与我传递的任何变量匹配。 我的代码是：

$xml_file ='SiteDetails.xml';
$xmlDoc = new DomDocument();
$xmlDoc->load($xml_file);
$xpath = new DOMXpath($xmlDoc);

$siteIDList =  $xpath->query("/GeteBayDetailsResponse/SiteDetails[Site=$site]/SiteID");

var_dump($siteIDList);
echo $siteIDList->SiteID;

我得到以下结果：

object(DOMNodeList)#11 (0) {
}

有人可以帮忙吗？ 我想得到3的值。

Answer 1

我认为您必须在$site周围加上引号并添加名称空间：

$xpath = new DOMXPath($xmlDoc);
$xpath->registerNamespace('ebay', 'urn:ebay:apis:eBLBaseComponents');

$siteIDList = $xpath->query("/ebay:GeteBayDetailsResponse/ebay:SiteDetails[ebay:Site='$site']/ebay:SiteID");

可以肯定的是，能否给我们提供给您此结果的$site值？

编辑：按照Vaman Kulkarni的建议添加了名称空间。

Answer 2

编辑：从弗洛朗的答案使用的API registerNamespace 。

您的XML文件包含默认名称空间。 因此，您可以像下面在代码中那样在默认名称空间（ urn:ebay:apis:eBLBaseComponents ）中注册像ebay这样的变量名称，并在xpath之后使用

$xpath->registerNamespace('ebay', 'urn:ebay:apis:eBLBaseComponents');

$siteIDList = $xpath->query("//ebay:Site[text()='$site']/following-sibling::ebay:SiteID/text()");

要么

您可以使用以下XPATH，除了评估它之外，它不需要任何其他代码：-)

//*[namespace-uri()='urn:ebay:apis:eBLBaseComponents' and name()='Site' and text()='$site']/following-sibling::*[namespace-uri()='urn:ebay:apis:eBLBaseComponents' and name()='SiteID']/text()

注意： $ site是<Site>节点的运行时值，将匹配<SiteID>值 。