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<?php $arr = ['a', 'b', 'c', 'd']; $arr2 = ['a', 'b', 'c', 'd', 'e', 'f', 'g']; var_dump(array_diff($arr2, $arr));
Output for git.master, git.master_jit, rfc.property-hooks
array(3) { [4]=> string(1) "e" [5]=> string(1) "f" [6]=> string(1) "g" }

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