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<?php $arr = ['foo' => ['bar' => 'baz']]; ['foo' => &$foo] = $arr; $foo = ['baz' => 'qux']; print_r($arr); // ['foo' => ['baz' => 'qux']];
Output for git.master, git.master_jit, rfc.property-hooks
Array ( [foo] => Array ( [baz] => qux ) )

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