使用XML格式的文件访问对象内的对象问题

Question

我有一个XML格式文件，其中有对象内的对象。这是我第一次拿到对象，这对我来说工作正常的值：

$soapclient = new SoapClient('http://anywb/book.asmx?WSDL'); 
$params = array('ISBN' => "1111"); 
$response = $soapclient->GetBookByISBN($params);  
//This will give me the value "Success" 
$result = $response->GetBookByISBNResult->ResponseText; 

现在的问题是如何访问这是内部对象的对象。例如，如何获得4的“BookID”以及如何获得1的“Type”值？

任何建议，将不胜感激。这里是对象：

stdClass Object 
     (
      [GetBookByISBN] => stdClass Object 
       (
        [ResponseText] => Success 
        [SearchResult] => stdClass Object 
         (
          [Search] => Array 
           (
            [0] => stdClass Object 
             (
              [Date] => 2015-10-20 
              [BookID] => 4 
              [Discription] => stdClass Object 
               ( 
                [Type] => 1 
               ) 

              [Probability] => stdClass Object 
               (
                [Kids] => 
                [Adult] => 00 
               ) 

             ) 

            [1] => stdClass Object 
             (
              [Date] => 2016-11-15 
              [BookID] => 5 
              [Discription] => stdClass Object 
               ( 
                [Type] => 2 
               ) 

              [Probability] => stdClass Object 
               (
                [Kids] => 
                [Adult] => 00 
               ) 
             ) 
    )))) 

Answer 1

你不喜欢这样：

$response->GetBookByISBN->SearchResult->Search[0]->BookID; 
$response->GetBookByISBN->SearchResult->Search[0]->Discription->Type; 

如果你想有一个包含所有书籍ID的数组，你将有这样的事情：

$BookIDs = array(); 

foreach($response->GetBookByISBN->SearchResult->Search as $key => $value) { 
    $BookIDs[$key] = $value->BookID; 
} 

或者如果您希望能够使用$BookIDs（作为示例）修改$response中的值，则看起来像这样：

$BookIDs = array(); 

foreach($response->GetBookByISBN->SearchResult->Search as $key => $value) { 
    $BookIDs[$key] = &$value->BookID; 
}