XML PHP讓孩子們珍惜

Question

XML：

<Result xmlns="" xmlns:xsi="" totalResultsAvailable="0" totalResultsReturned="0" schk="true" totalLooseOffers="0" xsi:schemaLocation=""> 
     <details> 
      <ID></ID> 
      <applicationVersion>1.0</applicationVersion> 
      <applicationPath/> 
      <date>2016-05-23T12:17:16.369-03:00</date> 
      <elapsedTime>17</elapsedTime> 
      <status>success</status> 
      <message>success</message> 
     </details> 
     <category id="1"> 
     <thumbnail url="http://image.google.com/test.jpg"/> 
     <links> 
      <link url="www.google.com" type="category"/> 
      <link url="www.google2.com" type="xml"/> 
     </links> 
     <name>Category</name> 
     <filters> 
      <filter id="1" name="Filter1"> 
       <value id="1" value="Test1"/> 
       <value id="2" value="Test2"/> 
       <value id="3" value="Test3"/> 
      </filter> 
      <filter id="2" name="Filter2"> 
       <value id="1" value="Test4"/> 
       <value id="2" value="Test5"/> 
       <value id="3" value="Test6"/> 
      </filter> 
     </filters> 
     </category> 
</Result> 

PHP：

$xml = simplexml_load_file("http://xml.com"); 
    foreach($xml->category->filters as $filters){ 
      foreach($filters->children() as $child){ 
        echo $child['value']; 
      } 
    } 

我試圖讓過濾器值，但沒有顯示的代碼，我有。我看到了有關xpath的一些信息，但不知道它是否適用於這種情況。你有任何線索嗎？

-

當XML看起來是這樣的：

<Result xmlns="" xmlns:xsi="" totalResultsAvailable="0" totalResultsReturned="0" schk="true" totalLooseOffers="0" xsi:schemaLocation=""> 
     <details> 
      <ID></ID> 
      <applicationVersion>1.0</applicationVersion> 
      <applicationPath/> 
      <date>2016-05-23T12:17:16.369-03:00</date> 
      <elapsedTime>17</elapsedTime> 
      <status>success</status> 
      <message>success</message> 
     </details> 
     <subCategory id="1"> 
      <thumbnail url="http://image.google.com/test.jpg"/> 
      <name>Subcategory</name> 
     </subCategory> 
     <subCategory id="2"> 
      <thumbnail url="http://image.google.com/test2.jpg"/> 
      <name>Subcategory2</name> 
     </subCategory> 
</Result> 

然後我能夠做到這一點：

foreach($xml->subCategory as $subCategory){ 
     $categoryId = $subCategory['id']; 
     $categoryName = $subCategory->name; 
} 

Answer 1

你作爲$child在內環實際指向的參考元素到<filter>節點，而不是您正試圖爲其定位屬性的子節點<value>。所以這真的只是延長外圍foreach循環以遍歷$xml->category->filters->filter而不是其父代$xml->category->filters。

// Iterate the correct <filter> node, not its parent <filters> 
foreach ($xml->category->filters->filter as $filter) { 
    foreach($filter->children() as $child){ 
     echo $child['value'] . "\n"; 
    } 
} 

這是在示範：https://3v4l.org/Rqc4Y

使用XPath，您可以直接針對內部節點。

$values = $xml->xpath('//category/filters/filter/value'); 
foreach ($values as $value) { 
    echo $value['value']; 
} 

https://3v4l.org/vPhKE

這兩個例子輸出

Test1 
Test2 
Test3 
Test4 
Test5 
Test6