Sorting XML with SimpleXML/XPath?

Question

I have some XML, say:

  
    14
  
  
    19&         


        

Answer 1

Possible solution:

• Parse the XML using SimpleXml
• Use usort to sort the array containing the background elements.
• Optionally, export it to XML again (there is no built-in function to do this)

Usort would work as follows:

function comp($a, $b) {
    return $b->Uses - $a->Uses;
}

usort($xml->Backgrounds, 'comp');

Another way is to use an XSLT, with something like this: