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<?php abstract class Foo implements Traversable { } class Bar extends Foo implements IteratorAggregate { public function getIterator() { return new ArrayIterator([1, 2, 3]); } } $b = new Bar; foreach ($b as $value) { var_dump($value); }
Output for git.master, git.master_jit, rfc.property-hooks
Deprecated: Return type of Bar::getIterator() should either be compatible with IteratorAggregate::getIterator(): Traversable, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/3hhjJ on line 7 int(1) int(2) int(3)

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