- var_dump: documentation ( source)
- array_multisort: documentation ( source)
<?php
$ary_main = array(0,8,4,7,6,2,4,8);
$args[] = array(1,8,3,7,2,2,4,1);
$args[] = SORT_ASC;
$args[] = array(6,5,3,2,5,7,5,3);
$args[] = SORT_DESC;
$args[] =& $ary_main;
$args = call_user_func_array("array_multisort", $args);
var_dump($args);