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<?php $a = new ArrayObject([1, 2, 3]); foreach ($a as $key => &$value) { $value = $value + 10; } unset($value); var_dump($a);
Output for git.master
object(ArrayObject)#1 (1) { ["storage":"ArrayObject":private]=> array(3) { [0]=> int(11) [1]=> int(12) [2]=> int(13) } }

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