Online PHP editor | refs for oqZ0D

@ 2016-10-20T13:05:11Z

<?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");