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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; } } } $dataContainer = new DataContainer([1, 2, 3]); foreach ($dataContainer as &$value) { echo ($value *= -1)," "; } // Weird result from neglecting to unset $value ... echo "\n"; foreach($dataContainer as $value){ echo $value," "; }
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/Q0Z1Q on line 9 -1 -2 -3 -1 -2 -2

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