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run code in 300+ PHP versions simultaneously
<?php class A implements \IteratorAggregate { public function getIterator() { foreach (range(1, 3) as $item) { yield new \stdClass() => $item; } } } foreach (new A() as $k => $v) { var_dump($k, $v); }

preferences:
50.84 ms | 402 KiB | 5 Q