php DOMDocument removeChild 删除节点函数
php教程 domdocument removechild 删除节点函数
本款教程实例是一款利用了 domdocument 的getelementbyid查询到指定的经删除节点，然后用removechildm删除指定xml节点bi
*/
public function deletecomment($id) {
$xml = new domdocument();
$xml->validateonparse=true;
$xml->loadxml($this->getcontents(true));
$message = $xml->getelementbyid($id);
$parentnode = $message->parentnode;
$parentnode->removechild($message);
$this->putcontents($xml->savexml());
}
/*
xml 文档
<?xml version="1.0" encoding="utf-8"?>
<!doctype messages [
<!element messages (message)*>
<!element message (name , website? , comment , date , user_ip? , user_agent? , spam)>
<!attlist message mid id #required>
<!element name (#pcdata)>
<!element website (#pcdata)>
<!element comment (#pcdata)>
<!element date (#pcdata)>
<!element spam (#pcdata)>
<!element user_ip (#pcdata)>
<!element user_agent (#pcdata)>
]>
<messages>
</messages>
*/
补充：Php教程,XML应用 
