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<?php $ArrayA = ["Genre1" => 1, "Genre2" => 2, "Genre3" => 3, "Genre4" => 4]; $ArrayB = [1, 2, 3]; print_r(array_diff($ArrayA, $ArrayB));
Output for git.master_jit, git.master, rfc.property-hooks
Array ( [Genre4] => 4 )

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