디스플레이는 PHP의 특정 속성을 가진 XML 노드

Question

내가있는 경우 :

<listing> 
<name>Bob</name> 
<age>20</age> 
<hair>red</hair> 
</listing> 

<listing> 
<name>John</name> 
<age>24</age> 
<hair>black</hair> 
</listing> 

내가 만 표시 목록에 내 PHP 페이지를 코딩 어떻게하면 머리 단지에서 끌어 것이라고

그래서 = 블랙

<listing> 
<name>John</name> 
<age>24</age> 
<hair>black</hair> 
</listing> 

감사

Answer 1

사용 XPath.

// First, your XML must be wraped with some root tag. 
$data = <<<XML 
<root> 
    <listing> 
     <name>Bob</name> 
     <age>20</age> 
     <hair>red</hair> 
    </listing> 

    <listing> 
     <name>John</name> 
     <age>24</age> 
     <hair>black</hair> 
    </listing> 
</root> 
XML; 

// Instancing the SimpleXMLElement within the XML(obviously) 
$xml = new SimpleXMLElement($data); 

// XPath 
$xpath = $xml->xpath("listing[contains(hair,'black')]"); 
/** 
* eXplained XPath: 
*  <listing> that 
*    <hair>'s content is equal black 
*/ 

foreach($xpath as $node){ 
    // just for fun echoes the <results> node 
    echo $node->asXml(); 
}