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<?php class DataContainer implements IteratorAggregate { // create an external Iterator: protected $data; public function __construct(array $data) { $this->data = $data; } public function &getIterator() { foreach ($this->data as &$value) { yield $value; } } } $dataContainer = new DataContainer([7, 8, 9]); foreach ($dataContainer as &$value) { echo $value *= -1; }
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/jTmCp on line 9 -7-8-9

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