filter_array.php

<?php
$hot_mess =
array(
	5 => 5,
	3 => array(
		12,
		12 => array(
			'name' => 1
		),
		32 => array(
			'name' => 4
		)
	)
);

function filter_array($array, $callback, $keep_index = FALSE) {
	return iterator_to_array(new CallbackFilterIterator(new RecursiveIteratorIterator(new RecursiveArrayIterator($array)), $callback), $keep_index);
}

$test = filter_array($hot_mess, function($value, $key, $iterator) {
	return $key === 'name' || $iterator->getDepth() == 1;
});
var_dump($test);
var_dump($hot_mess);




$hot_mess =
array(
	5 => 5,
	3 => array(
		12,
		12 => array(
			'name' => 1
		),
		32 => array(
			'name' => 4
		)
	)
);
function iterate_array(array $array, $flag = RecursiveIteratorIterator::LEAVES_ONLY) {
	return new RecursiveIteratorIterator(new RecursiveArrayIterator($array), $flag);
}

function filter_iterator($iterator, $callback) {
	return new CallbackFilterIterator($iterator, $callback);
}

$iterator = filter_iterator(iterate_array($hot_mess), function($value, $key, $iterator) {
	return $key === 'name' || $iterator->getDepth() == 1;
});
$test = iterator_to_array($iterator, FALSE);
var_dump($test);