Sort two arrays with two identical values in PHP

Description

The following code shows how to sort two arrays with two identical values.

Example

// w  w  w  . ja v a 2 s.  c o m
<?php
    $a1=array("Dog","Dog","Cat");
    $a2=array("XML","HTML","CSS");
    array_multisort($a1,$a2);
    print_r($a1);
    print_r($a2);
?>

The code above generates the following result.