<?php class Collection implements IteratorAggregate { public function __construct(array $data) { $this->data = $data; } public function getIterator() { krsort($this->data); return new RecursiveIteratorIterator(new RecursiveArrayIterator($this->data)); } } $c = new Collection([ 10 => ['a', 'b'], 20 => ['c'], ]); var_dump(iterator_to_array($c, false));
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