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<?php $arr = array('test' => array('percy' => array('hello' => 'hatcherson'), 'percy' => array('mitchell', 'anderson'))); $allowed = array('test'); $res = array_intersect_key($arr, array_flip($allowed)); var_dump($res);
Output for git.master, git.master_jit, rfc.property-hooks
array(1) { ["test"]=> array(1) { ["percy"]=> array(2) { [0]=> string(8) "mitchell" [1]=> string(8) "anderson" } } }

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