Question

从这个xml文件我想根据属性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');

我认为xpath工作不正常。控制不在foreach

Answer 1

问题是您在之后加载文档 ，并将文档传递给DOMXPath。

更改

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

到

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

然后它应该工作。

要仅删除具有给定id而不是整个父级的图片元素，请将XPath更改为

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

根据属性从XML中删除节点

1 个答案: