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<?php $a = array('x' => 1, 'y' => 2, 'z' => 3, 'a' => 4, 'b' => 4); $b = array('x', 'z', 'a'); $result = array_intersect_key($a, array_flip($b)); print_r($result);
Output for git.master, git.master_jit, rfc.property-hooks
Array ( [x] => 1 [z] => 3 [a] => 4 )

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