- var_dump: documentation ( source)
- array_reduce: documentation ( source)
<?php
$a = array('a'=>1,'b'=>2,'c'=>3);
array_reduce($a, function($result, $item) use ($a) {
//$key = $result ? key($result) : $a;
//$key = $key == 'a' ? 'aa' : $key;
var_dump($item);
return $result;
});