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<?php class C implements IteratorAggregate { private int $prop = 42; public function getIterator() { return new ArrayIterator(["a"]); } } $c = new C; array_walk($c, function ($v, $k) { var_dump($v, addslashes($k)); });
Output for git.master, git.master_jit, rfc.property-hooks
Deprecated: Return type of C::getIterator() should either be compatible with IteratorAggregate::getIterator(): Traversable, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/6otJZ on line 5 int(42) string(9) "\0C\0prop"

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