在php中组合XML文件

$combinedXml = new DOMDocument();

$root = $combinedXml->createElement('root');
$combinedXml->appendChild($root);

$xml1 = new DOMDocument();
$xml1->load('file1.xml');

$xml2 = new DOMDocument();
$xml2->load('file2.xml');

$root1 = $xml1->documentElement;
$root2 = $xml2->documentElement;

foreach ($root1->childNodes as $node) {
    $importedNode = $combinedXml->importNode($node, true);
    $root->appendChild($importedNode);
}

foreach ($root2->childNodes as $node) {
    $importedNode = $combinedXml->importNode($node, true);
    $root->appendChild($importedNode);
}

$combinedXml->save('combined.xml');