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<?php $arr1 = array(1, 2); $arr2 = array(11, 12); foreach ($arr1 as &$v) { } foreach ($arr2 as $v) { } var_dump($arr1); var_dump($arr2);
Output for 5.3.6 - 7.1.0
array(2) { [0]=> int(1) [1]=> &int(12) } array(2) { [0]=> int(11) [1]=> int(12) }