(PHP 5 >= 5.2.0, PHP 7)
SimpleXMLElement::saveXML — 锟斤拷锟斤拷 SimpleXMLElement::asXML()
锟剿凤拷锟斤拷锟角该凤拷锟斤拷锟侥憋拷锟斤拷锟斤拷 SimpleXMLElement::asXML()