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<?php $a = ['a', 'b', 'c']; var_dump(array_intersect($a, array_flip(['a' => 1, 'c' => 2, 'b' => 3])));
Output for git.master, git.master_jit, rfc.property-hooks
array(3) { [0]=> string(1) "a" [1]=> string(1) "b" [2]=> string(1) "c" }

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