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run code in 300+ PHP versions simultaneously
<?hh $a = [1, 2]; $b = new IteratorIterator($a); foreach ($b as $key => $value) { var_dump($key, $value); }
Output for rfc.property-hooks, git.master, git.master_jit
<?hh $a = [1, 2]; $b = new IteratorIterator($a); foreach ($b as $key => $value) { var_dump($key, $value); }

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