根据属性

Question

从XML中删除节点我想根据属性ID删除图片节点。 我写了php代码，但它不起作用。

<gallery> 
     <organizate> 
     <organization w="3" h="1" space="17"/> 
     <organization w="4" h="2" space="17"/> 
     <organization w="6" h="3" space="7"/> 
     </organizate> 
     <pictures> 
     <picture target="events/preview/10picture1.jpg" title="test1" movie="" text="test1" link="events_calender.php" id="38"/> 
     <picture target="events/preview/8picture7.jpg" title="test2" movie="" text="cxvxc" link="events_calender.php" id="39"/> 
     <picture target="events/preview/5picture10.jpg" title="test3" movie="" text="test3" link="events_calender.php" id="40"/> 
     </pictures> 
    </gallery> 

PHP代码

$doc = new DOMDocument(); 
$doc->formatOutput = TRUE; 
$doc->preserveWhiteSpace = FALSE; 
$xPath = new DOMXPath($doc); 
$doc->load('../Event_gallery.xml'); 
$query = sprintf('//pictures[./picture[@id="%s"]]', 38); 
foreach ($xPath->query($query) as $node) { 
    $node->parentNode->removeChild($node); 
} 
$doc->save('../Event_gallery.xml'); 

我觉得XPath是不能正常工作。控制未在的foreach

Answer 1

问题将会是你后您通过文档DOMXPath加载文档。

变化

$xPath = new DOMXPath($doc); 
$doc->load('../Event_gallery.xml'); 

到

$doc->load('../Event_gallery.xml'); 
$xPath = new DOMXPath($doc); 

那么它应该工作。

只删除指定id而不是整个父像素，改变XPath来

//pictures/picture[@id="38"]