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<?php $array_of_months = array('January','February','March','April','May','June','July','August','September','October','November','December'); $queryResult = ['January','February','April','May','July','August', 'October','November']; $notPaid = array_diff($array_of_months, $queryResult); print_r($notPaid);
Output for git.master, git.master_jit, rfc.property-hooks
Array ( [2] => March [5] => June [8] => September [11] => December )

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