Online PHP editor | refs for Xqnac

<?php class DataContainer implements IteratorAggregate { public $data; public function __construct(array $data) { $this->data = $data; } public function getIterator() { foreach ($this->data as $key => $value) { yield $key => $value; } } } $dataContainer = new DataContainer([1, 2, 3]); foreach ($dataContainer as $value) { $value *= -1; $value->data = $value; } foreach ($dataContainer as $value); var_dump($dataContainer);