- var_dump: documentation ( source)
- asort: documentation ( source)
- array_walk: documentation ( source)
<?php
$a = array(1,5,16,7,4);
$b = $a;
asort($b);
var_dump($b);
$a = array_intersect_keys($b, $a);
var_dump($a);
array_walk($a, function(&$value) { ++$value; });
var_dump($a);