php根据节点属性值删除节点

删除name为a23的节点

$dom = new DOMDocument();
$dom->load("tour.xml");
$xpath = new DOMXPath($dom);
$query = "//hotspot[@name = 'a23']";
$hots = $xpath->query($query)->item(0);
$hots->parentNode->removeChild($hots);
$dom->save('tour.xml');