如何使用php交换xml文件中两个节点的位置

有两个场景节点，我想交换它们的位置

我的对象根据此场景位置进行渲染，我想更改渲染顺序

提前谢谢

    <view hlookat="0" vlookat="0" fovtype="MFOV" fov="120" maxpixelzoom="2.0" fovmin="70" fovmax="140" limitview="range" vlookatmin="-56.738" vlookatmax="56.738"/>

    <preview url="panos/301760039505_20120929_7D_0891Panorama-e.tiles/preview.jpg"/>

    <image type="CUBE" multires="true" tilesize="512" progressive="false">
        <level tiledimagewidth="808" tiledimageheight="808">
            <cube url="panos/301760039505_20120929_7D_0891Panorama-e.tiles/%s/l1/%v/l1_%s_%v_%h.jpg"/>
        </level>
        <mobile>
            <cube url="panos/301760039505_20120929_7D_0891Panorama-e.tiles/mobile_%s.jpg"/>
        </mobile>
    </image>

    <!-- place your scene hotspots here -->

</scene>

<scene name="scene_301760039601_20120929_7D_0946Panorama-e" title="Exterior" onstart="" thumburl="panos/301760039601_20120929_7D_0946Panorama-e.tiles/thumb.jpg" lat="" lng="" heading="">

    <view hlookat="0" vlookat="0" fovtype="MFOV" fov="120" maxpixelzoom="2.0" fovmin="70" fovmax="140" limitview="range" vlookatmin="-56.738" vlookatmax="56.738"/>

    <preview url="panos/301760039601_20120929_7D_0946Panorama-e.tiles/preview.jpg"/>

    <image type="CUBE" multires="true" tilesize="512" progressive="false">
        <level tiledimagewidth="808" tiledimageheight="808">
            <cube url="panos/301760039601_20120929_7D_0946Panorama-e.tiles/%s/l1/%v/l1_%s_%v_%h.jpg"/>
        </level>
        <mobile>
            <cube url="panos/301760039601_20120929_7D_0946Panorama-e.tiles/mobile_%s.jpg"/>
        </mobile>
    </image>

    <!-- place your scene hotspots here -->

</scene>

---

将XML加载到DOMDocument中，使用Xpath或DOM函数查找节点并移动它们：

$xml = <<<'XML'
<scenes>
  <scene name="one"/>
  <scene name="other"/>
  <scene name="two"/>
</scenes>
XML;

$dom = new DOMDocument();
$dom->loadXml($xml);
$xpath = new DOMXPath($dom);

// find the nodes
$nodeOne = $xpath->evaluate('//scene[@name="one"]')->item(0);
$nodeTwo = $xpath->evaluate('//scene[@name="two"]')->item(0);

if (!$nodeOne->isSameNode($nodeTwo)) {

  // remember parent and position of the second node
  $parent = $nodeTwo->parentNode;
  $target = $nodeTwo->nextSibling;

  // move the second node
  $nodeOne->parentNode->insertBefore($nodeTwo, $nodeOne->nextSibling);

  // move the first node
  $parent->insertBefore($nodeOne, $target);
}
header('Content-type: text/xml');
echo $dom->saveXml();

$xml=项（0）；
$nodewo=$xpath->evaluate（'//scene[@name=“two”]'）->项（0）；
if（！$nodeOne->isSameNode（$nodewo））{
//记住第二个节点的父节点和位置
$parent=$nodewo->parentNode；
$target=$nodeTwo->nextSibling；
//移动第二个节点
$nodeOne->parentNode->insertBefore（$nodewo，$nodeOne->nextSibling）；
//移动第一个节点
$parent->insertBefore（$nodeOne，$target）；
}
标题（'Content-type:text/xml'）；
echo$dom->saveXml（）；

为每个元素添加一个节点

，并更改这些值。然后阅读

XML

，按

排序。