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<?php // fr Nikita's RFC 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; } } } $dataContainer = new DataContainer([1, 2, 3]); foreach ($dataContainer as &$value) { $value *= -1; } // $this->data is now [-1, -2, -3] foreach ($dataContainer as $value); var_dump($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/iq5BU on line 11 object(DataContainer)#1 (1) { ["data":protected]=> array(3) { [0]=> int(-1) [1]=> int(-2) [2]=> &int(-2) } }

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