我有以下 XML 文件：
<?xml version="1.0" encoding="utf-8"?>
<SearchResults:searchresults xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.zillow.com/static/xsd/SearchResults.xsd /vstatic/279989c5e93d519f8d8f23d3f6cac661/static/xsd/SearchResults.xsd" xmlns:SearchResults="http://www.zillow.com/static/xsd/SearchResults.xsd">
<request>
<address>2114 Bigelow Ave</address>
<citystatezip>Seattle, WA</citystatezip>
</request>
<message>
<text>Request successfully processed</text>
<code>0</code>
</message>
<response>
<results>
<result>
<zpid>48749425</zpid>
<links>
<homedetails>http://www.zillow.com/homedetails/2114-Bigelow-Ave-N-Seattle-WA-98109/48749425_zpid/</homedetails>
<graphsanddata>http://www.zillow.com/homedetails/charts/48749425_zpid,1year_chartDuration/?cbt=3697699817560038867%7E3%7EQh4sEjEhBNEguUWA-0f22TvGUpBB7FpUkAZlBRy5_26R5PYjKDdVAA**</graphsanddata>
<mapthishome>http://www.zillow.com/homes/48749425_zpid/</mapthishome>
<myestimator>http://www.zillow.com/myestimator/Edit.htm?zprop=48749425</myestimator>
<myzestimator deprecated="true">http://www.zillow.com/myestimator/Edit.htm?zprop=48749425</myzestimator>
<comparables>http://www.zillow.com/homes/comps/48749425_zpid/</comparables>
</links>
<address>
<street>2114 Bigelow Ave N</street>
<zipcode>98109</zipcode>
<city>Seattle</city>
<state>WA</state>
<latitude>47.63793</latitude>
<longitude>-122.347936</longitude>
</address>
<zestimate>
<amount currency="USD">1112500</amount>
<last-updated>01/14/2010</last-updated>
<oneWeekChange deprecated="true"></oneWeekChange>
<valueChange duration="30" currency="USD">-77500</valueChange>
<valuationRange>
<low currency="USD">878875</low>
<high currency="USD">1145875</high>
</valuationRange>
<percentile>0</percentile>
</zestimate>
<localRealEstate>
<region id="271856" type="neighborhood" name="East Queen Anne">
<zindexValue>525,252</zindexValue>
<zindexOneYearChange>-0.104</zindexOneYearChange>
<links>
<overview>http://www.zillow.com/local-info/WA-Seattle/East-Queen-Anne/r_271856/</overview>
<forSaleByOwner>http://www.zillow.com/homes/fsbo/East-Queen-Anne-Seattle-WA/</forSaleByOwner>
<forSale>http://www.zillow.com/homes/for_sale/East-Queen-Anne-Seattle-WA/</forSale>
</links>
</region>
<region id="16037" type="city" name="Seattle">
<zindexValue>373,795</zindexValue>
<zindexOneYearChange>-0.064</zindexOneYearChange>
<links>
<overview>http://www.zillow.com/local-info/WA-Seattle/r_16037/</overview>
<forSaleByOwner>http://www.zillow.com/homes/fsbo/Seattle-WA/</forSaleByOwner>
<forSale>http://www.zillow.com/homes/for_sale/Seattle-WA/</forSale>
</links>
</region>
<region id="59" type="state" name="Washington">
<zindexValue>256,760</zindexValue>
<zindexOneYearChange>-0.074</zindexOneYearChange>
<links>
<overview>http://www.zillow.com/local-info/WA-home-value/r_59/</overview>
<forSaleByOwner>http://www.zillow.com/homes/fsbo/WA/</forSaleByOwner>
<forSale>http://www.zillow.com/homes/for_sale/WA/</forSale>
</links>
</region>
</localRealEstate>
</result>
</results>
</response>
</SearchResults:searchresults>
<!-- H:118 T:102ms S:1761 R:Fri Jan 15 10:52:49 PST 2010 B:3.0.79367-comp_rel_b -->
如果您还不知道，这是 Zillow API 的标准输出。我想存储某些标签之间存储的信息数据，我了解到这些信息是通过xpath查询的。
例如，我如何查询 /SearchResults:searchresults/request/address 中的数据？当我回显/打印变量时，做这样的事情不起作用：
$xml = simplexml_load_file("-truncated XML URL-");
$result = $xml->xpath('/SearchResults:searchresults/request/address')
据我了解， $result 变量应该包含嵌套在 %VALUE HERE% 中的值，对吗？但它打印“Array”，当我 print_r 时，它返回空白。
这是获取该信息的简单方法：
<?php
$xml = simplexml_load_file("test.xml");
echo $xml->request->address;
?>
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