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<?php $row = [ 'sub_date' => '2016-08-29', 'due_date' => '08-23' ]; $duedate = new DateTime(date("Y")."-".$row['due_date']); $submitdate = new DateTime($row['sub_date']); echo $duedate->diff($submitdate)->format("%R%a days");

This is an error 500

Value for `_results` contains invalid data `array`


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