Sort an associative array in descending order, according to the key in PHP

Description

The following code shows how to sort an associative array in descending order, according to the key.

Example

  //w w w .  jav a  2  s .c  o  m
<?php
    $age=array("XML"=>"35","HTML"=>"37","CSS"=>"43");
    krsort($age);
?>