©
                    本文档使用
                    php中文网手册 发布
                
(PHP 5, PHP 7)
DOMElement::setAttributeNodeNS — Adds new attribute node to element
$attr 
   )
   Adds new attribute node attr to element. 
  
attr The attribute node.
Returns the old node if the attribute has been replaced.
DOM_NO_MODIFICATION_ALLOWED_ERR  Raised if the node is readonly.