Remove all children from a XML Node PHP DOM

I want to remove all children from a开发者_开发百科 XML Node using PHP DOM, is there any difference between:

A)

while ($parentNode->hasChildNodes()){
   $parentNode->removeChild($parentNode->childNodes->item(0));
 }

AND

B)

$node->nodeValue = "";

I prefer the second one, seems like I am getting the same result but I'm not sure.

Thanks, Carlos

Slightly tighter:

  while ($parentNode->hasChildNodes()) {
    $parentNode->removeChild($parentNode->firstChild);
  }

removeChild() is the more "proper" way of doing things. While you can set the contents of that node to "" and this will acquire the desired effect, calling removeChild() is much more apparent as to what is going on. However, it would be my assumption that, in a minuscule level, nodeValue() is slightly more efficient.