PHP将xml节点从一个doc复制到另一个doc

Question

首先,我需要通过xml doc中的特定子节点值查找父节点; 然后将一些特定的子节点从父节点复制到另一个xml doc.

例如:

DESTINATION FILE: ('destination.xml') 
<item>
    <offerStartDate>2012-15-02</offerStartDate>
    <offerEndDate>2012-19-02</offerEndDate>
    <title>Item Title</title> 
    <rrp>14.99</rrp>
    <offerPrice>9.99</offerPrice>
</item> 

和

SOURCE FILE: ('source.xml') 
<items> 
    <item> 
         <title>Item A</title> 
         <description>This is the description for Item A</description> 
         <id>1003</id>
         <price>
             <rrp>10.00</rrp>
             <offerPrice>4.99</offerPrice>
         </price>
         <offer>
             <deal>
                 <isLive>0</isLive>
             </deal>
         </offer>
    </item>
    <item> 
         <title>Item B</title> 
         <description>This is the description for Item B</description> 
         <id>1003</id>
         <price>
             <rrp>14.99</rrp>
             <offerPrice>9.99</offerPrice>
         </price>
         <offer>
             <deal>
                 <isLive>1</isLive>
             </deal>
         </offer>
    </item> 
    <item> 
         <title>Item C</title> 
         <description>This is the description for Item C</description> 
         <id>1003</id>
         <price>
             <rrp>9.99</rrp>
             <offerPrice>5.99</offerPrice>
         </price>
         <offer>
             <deal>
                 <isLive>0</isLive>
             </deal>
         </offer>
    </item> 

我想找到将<item>其子节点<isLive>值设置为"1" 的父节点.然后将父节点的其他子节点复制到目标xml.

例如,如果父节点<item>都有其子节点<isLive>设置为1复制<title>,<rrp>以及<offerPrice>节点和它们的值,并将其添加到目标文件的子节点,如上图所示.

请原谅我的技术术语,如果我没有正确使用它们.

非常感谢帮助人员!

Answer 1

使用SimpleXml(演示):

$dItems = simplexml_load_file('destination.xml');
$sItems = simplexml_load_file('source.xml');
foreach ($sItems->xpath('/items/item[offer/deal/isLive=1]') as $item) {
    $newItem = $dItems->addChild('item');
    $newItem->addChild('title', $item->title);
    $newItem->addChild('rrp', $item->price->rrp);
    $newItem->addChild('offerprice', $item->price->offerPrice);
}
echo $dItems->saveXML();

使用DOM(演示):

$destination = new DOMDocument;
$destination->preserveWhiteSpace = false;
$destination->load('destination.xml');
$source = new DOMDocument;
$source->load('source.xml');
$xp = new DOMXPath($source);
foreach ($xp->query('/items/item[offer/deal/isLive=1]') as $item)
{
    $newItem = $destination->documentElement->appendChild(
        $destination->createElement('item')
    );
    foreach (array('title', 'rrp', 'offerPrice') as $elementName) {
        $newItem->appendChild(
            $destination->importNode(
                $item->getElementsByTagName($elementName)->item(0),
                true
            )
        );
    }
}
$destination->formatOutput = true;
echo $destination->saveXml();