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<?php $arrayOld = [1, 2, 3, 4, 5]; $arrayNew = [1, 4, 5, 6, 7]; $n = array_diff($arrayOld, $arrayNew); print_r($n);
Output for git.master, git.master_jit, rfc.property-hooks
Array ( [1] => 2 [2] => 3 )

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