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<?php class DataContainer implements IteratorAggregate { protected $data; public function __construct(array $data) { $this->data = $data; } public function &getIterator() { foreach ($this->data as $key => &$value) { yield $key => $value; } } } $dataContainer = new DataContainer([1, 2, 3]); foreach (array_keys((array)$dataContainer) as $key) { $dataContainer[$key] *= -1; } var_dump($dataContainer);
Output for git.master, git.master_jit, rfc.property-hooks
Deprecated: Return type of & DataContainer::getIterator() should either be compatible with IteratorAggregate::getIterator(): Traversable, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/l558T on line 11 Fatal error: Uncaught Error: Cannot use object of type DataContainer as array in /in/l558T:20 Stack trace: #0 {main} Next Error: Cannot use object as array in /in/l558T:20 Stack trace: #0 {main} thrown in /in/l558T on line 20
Process exited with code 255.

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