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run code in 200+ php & hhvm versions
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<?php array_reduce([1, 2, 3, 4], function ($carry, $value) { if ($value === 3) { var_dump($carry); return $value; } var_dump($carry); });
based on dFoSZ
Output for 5.6.0 - 5.6.30, hhvm-3.18.5 - 3.22.0, 7.0.0 - 7.3.0rc3
NULL NULL NULL int(3)