使用基于特定标记 ID 的 Foreach 循环提取 XML 数据

Question

我正在尝试根据标签的值从XML文档中提取数据，<styleId>。

如果<styleId> = 292015我希望列出value数据，同样，如果<styleId> = 292016我希望列出value数据。下面是一个示例：

<technicalSpecification>
<titleId>6</titleId>
<value value="All-Wheel Drive" condition="">
<styleId>292015</styleId>
<styleId>292016</styleId>
</value>
</technicalSpecification>

因此，对于上述内容，如果我调用包含<styleId>292015</styleId>的所有value数据，我将收到All-Wheel Drive。此外，如果我要调用所有包含<styleId>292016</styleId>value数据，我也会收到All-Wheel Drive。

这是我从中提取的完整 XML 文档。

<S:Envelope xmlns:S="http://schemas.xmlsoap.org/soap/envelope/">
<S:Body>
<VehicleDescription country="US" language="en" modelYear="2008" bestMakeName="Audi" bestModelName="S4" bestStyleName="5dr Avant Wgn" xmlns="urn:description7b.services.chrome.com">
<responseStatus responseCode="Successful" description="Successful"/>
<style id="292015" modelYear="2008" name="5dr Avant Wgn Man" nameWoTrim="5dr Avant Wgn Man" mfrModelCode="8ED549" fleetOnly="false" modelFleet="false" passDoors="4" altBodyType="Station Wagon" drivetrain="All Wheel Drive">
<division id="4">Audi</division>
<subdivision id="5020">Audi</subdivision>
<model id="17308">S4</model>
<basePrice unknown="false" invoice="46137.0" msrp="49610.0" destination="775.0"/>
<bodyType primary="true" id="7">Station Wagon</bodyType>
<marketClass id="53">Small Wagon</marketClass>
<acode>USB80AUC085A0</acode>
</style>
<style id="292016" modelYear="2008" name="5dr Avant Wgn Auto" nameWoTrim="5dr Avant Wgn Auto" mfrModelCode="8ED54L" fleetOnly="false" modelFleet="false" passDoors="4" altBodyType="Station Wagon" drivetrain="All Wheel Drive">
<division id="4">Audi</division>
<subdivision id="5020">Audi</subdivision>
<model id="17308">S4</model>
<basePrice unknown="false" invoice="47162.0" msrp="50710.0" destination="775.0"/>
<bodyType primary="true" id="7">Station Wagon</bodyType>
<marketClass id="53">Small Wagon</marketClass>
<acode>USB80AUC085A1</acode>
</style>
<technicalSpecification>
<titleId>1</titleId>
<value value="Audi S4" condition="-PT">
<styleId>292015</styleId>
<styleId>292016</styleId>
</value>
<value value="Audi S4" condition="">
<styleId>292015</styleId>
<styleId>292016</styleId>
</value>
</technicalSpecification>
<technicalSpecification>
<titleId>2</titleId>
<value value="5 Door Wagon" condition="">
<styleId>292015</styleId>
<styleId>292016</styleId>
</value>
</technicalSpecification>
<technicalSpecification>
<titleId>6</titleId>
<value value="All-Wheel Drive" condition="">
<styleId>292015</styleId>
<styleId>292016</styleId>
</value>
</technicalSpecification>
<technicalSpecification>
<titleId>7</titleId>
<value value="Small Station Wagon" condition="">
<styleId>292015</styleId>
<styleId>292016</styleId>
</value>
</technicalSpecification>
<technicalSpecification>
<titleId>8</titleId>
<range min="5.0" max="5.0"/>
<value value="5" condition="">
<styleId>292015</styleId>
<styleId>292016</styleId>
</value>
</technicalSpecification>
<technicalSpecification>
<titleId>9</titleId>
<range min="90.8" max="90.8"/>
<value value="90.8" condition="">
<styleId>292015</styleId>
<styleId>292016</styleId>
</value>
</technicalSpecification>
<technicalSpecification>
<titleId>10</titleId>
<range min="4012.0" max="4101.0"/>
<value value="4012" condition="">
<styleId>292015</styleId>
</value>
<value value="4101" condition="">
<styleId>292016</styleId>
</value>
</technicalSpecification>
<technicalSpecification>
<titleId>26</titleId>
<range min="13.0" max="14.0"/>
<value value="13" condition="">
<styleId>292015</styleId>
</value>
<value value="14" condition="">
<styleId>292016</styleId>
</value>
</technicalSpecification>
<technicalSpecification>
<titleId>27</titleId>
<range min="20.0" max="21.0"/>
<value value="20" condition="">
<styleId>292015</styleId>
</value>
<value value="21" condition="">
<styleId>292016</styleId>
</value>
</technicalSpecification>
<technicalSpecification>
<titleId>31</titleId>
<value value="- TBD -" condition="">
<styleId>292015</styleId>
<styleId>292016</styleId>
</value>
</technicalSpecification>
<technicalSpecification>
<titleId>32</titleId>
<value value="- TBD -" condition="">
<styleId>292015</styleId>
<styleId>292016</styleId>
</value>
</technicalSpecification>
<technicalSpecification>
<titleId>33</titleId>
<value value="- TBD -" condition="">
<styleId>292015</styleId>
<styleId>292016</styleId>
</value>
</technicalSpecification>
<technicalSpecification>
<titleId>34</titleId>
<value value="- TBD -" condition="">
<styleId>292015</styleId>
<styleId>292016</styleId>
</value>
</technicalSpecification>
<technicalSpecification>
<titleId>40</titleId>
<value value="" condition="">
<styleId>292015</styleId>
<styleId>292016</styleId>
</value>
</technicalSpecification>
<technicalSpecification>
<titleId>41</titleId>
<value value="Gas V8" condition="">
<styleId>292015</styleId>
<styleId>292016</styleId>
</value>
</technicalSpecification>
<technicalSpecification>
<titleId>42</titleId>
<value value="4.2L/254" condition="">
<styleId>292015</styleId>
<styleId>292016</styleId>
</value>
</technicalSpecification>
<technicalSpecification>
<titleId>43</titleId>
<value value="SEFI" condition="">
<styleId>292015</styleId>
<styleId>292016</styleId>
</value>
</technicalSpecification>
<technicalSpecification>
<titleId>48</titleId>
<value value="340 @ 6800" condition="">
<styleId>292016</styleId>
</value>
<value value="340 @ 7000" condition="">
<styleId>292015</styleId>
</value>
</technicalSpecification>
<technicalSpecification>
<titleId>49</titleId>
<value value="302 @ 3500" condition="">
<styleId>292015</styleId>
<styleId>292016</styleId>
</value>
</technicalSpecification>
<technicalSpecification>
<titleId>51</titleId>
<value value="" condition="">
<styleId>292015</styleId>
<styleId>292016</styleId>
</value>
</technicalSpecification>
<technicalSpecification>
<titleId>52</titleId>
<range min="6.0" max="6.0"/>
<value value="6" condition="">
<styleId>292015</styleId>
<styleId>292016</styleId>
</value>
</technicalSpecification>
<technicalSpecification>
<titleId>53</titleId>
<value value="Manual" condition="">
<styleId>292015</styleId>
</value>
<value value="Automatic" condition="">
<styleId>292016</styleId>
</value>
</technicalSpecification>
<technicalSpecification>
<titleId>54</titleId>
<value value="" condition="">
<styleId>292015</styleId>
<styleId>292016</styleId>
</value>
</technicalSpecification>
<technicalSpecification>
<titleId>56</titleId>
<range min="3.67" max="4.17"/>
<value value="3.67" condition="">
<styleId>292015</styleId>
</value>
<value value="4.17" condition="">
<styleId>292016</styleId>
</value>
</technicalSpecification>
<technicalSpecification>
<titleId>57</titleId>
<range min="2.05" max="2.34"/>
<value value="2.05" condition="">
<styleId>292015</styleId>
</value>
<value value="2.34" condition="">
<styleId>292016</styleId>
</value>
</technicalSpecification>
<technicalSpecification>
<titleId>58</titleId>
<range min="1.46" max="1.52"/>
<value value="1.46" condition="">
<styleId>292015</styleId>
</value>
<value value="1.52" condition="">
<styleId>292016</styleId>
</value>
</technicalSpecification>
<technicalSpecification>
<titleId>59</titleId>
<range min="1.13" max="1.14"/>
<value value="1.13" condition="">
<styleId>292015</styleId>
</value>
<value value="1.14" condition="">
<styleId>292016</styleId>
</value>
</technicalSpecification>
</VehicleDescription>

以下是我当前的一些PHP：

<?php
$xml = file_get_contents('data.xml');
$dom = new DOMDocument();
$dom->loadXML($xml);
?>
<?php

foreach ( $dom->getElementsByTagName('technicalSpecification') as $techSpec )   {
if ($techSpec->getElementsByTagName('styleId')->item(0)->nodeValue == '292015'){
$techDatass = $techSpec->getElementsByTagName('value')->item(0)->getAttribute("value");
$techData[] = $techDatass;
}
}
foreach ($techData as $finalTech){
echo $finalTech."<br>";
}
echo "<br><br>";
?>

这将返回包含<styleId>292015</styleId>的大多数值数据。但是，它不会返回与该标记相关的所有值数据。此外，如果我292016插入它，它只返回一个值。我相信这是因为item(0).我不确定如何构建循环，以便在292015之后出现292016它仍然会识别并显示value数据。

任何帮助将不胜感激。

Answer 1

如果你想坚持使用DOMDocument，你可以添加一些嵌套循环：

$dom = new DOMDocument();
$dom->loadXml($xml);
$techData = [];
foreach ( $dom->getElementsByTagName('technicalSpecification') as $techSpecElement )   {
foreach($techSpecElement->getElementsByTagName('value') as $valueElement) {
foreach($valueElement->getElementsByTagName('styleId') as $styleIdElement) {
// check the value of the styleId here
if (in_array($styleIdElement->nodeValue, ['292015','292016'])) {
// if it matches, get the parent value element's value
$techData[] = $valueElement->getAttribute("value");
}
}
}
}

Answer 2

使用DOMXPath

$xpath = new DOMXPath($doc);
// We starts from the root element
$query = '//value/styleId';
$entries = $xpath->query($query);
foreach ($entries as $entry) {
$styleId = $entry->nodeValue;
$value = $entry->parentNode->attributes->getNamedItem("value");
echo "$styleId -> $valuen";
}