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<?php $arr = ['a' => 1]; $arr['b'] = &$arr['a']; var_dump($arr); $arr['b'] = 'xiami'; var_dump($arr);
Output for git.master, git.master_jit, rfc.property-hooks
array(2) { ["a"]=> &int(1) ["b"]=> &int(1) } array(2) { ["a"]=> &string(5) "xiami" ["b"]=> &string(5) "xiami" }

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