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<?php $i = 1; $a = [1,2,$i,4,5]; $iter = new ArrayIterator($a); foreach($iter as &$v) { $v = 1; } var_dump($a); var_dump($iter);
Output for git.master, git.master_jit, rfc.property-hooks
array(5) { [0]=> int(1) [1]=> int(2) [2]=> int(1) [3]=> int(4) [4]=> int(5) } object(ArrayIterator)#1 (1) { ["storage":"ArrayIterator":private]=> array(5) { [0]=> int(1) [1]=> int(1) [2]=> int(1) [3]=> int(1) [4]=> &int(1) } }

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