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<?php $array1 = [[12 => 'new q sets'], [11 => 'common set']]; $array2 = [[11 => 'common set']]; var_export(array_udiff($array1, $array2, fn($a, $b) => $a <=> $b));
Output for git.master, git.master_jit, rfc.property-hooks
array ( 0 => array ( 12 => 'new q sets', ), )

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