Array Map Recursive

array_map_r.php

function array_map_r($callback, $input) {
	$output= Array();
	foreach ($input as $key => $data) {
		if (is_array($data)) {
			$output[$key] = array_map_r($callback, $data);
		} else {
			$output[$key] = $callback($data);
		}
	}
	return $output;
}