In PHP, how can I get the Outer XML from a DOMNode?

Question

If you have DOMNode in PHP, how can you get the outer xml (i.e. the all of the XML that is inside this element plus the element itself)?

For example, lets say this i

Answer 1

After an hour spent, I came up with this (it seems the best solution)

$node->ownerDocument->saveXml($node);