有两个场景节点，我想交换更改它们的位置
我的对象根据这个场景位置进行渲染，我想更改的渲染顺序
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函数找到节点并移动它们：
$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();