Online PHP editor | output for iaAq1

<?php /** * Boilerplate to setup variables */ $start = new \DateTime('2013-01-01'); $end = new \DateTime('2013-12-31'); $interval = new \DateInterval('P1D'); $period = new \DatePeriod($start, $interval, $end->add($interval)); foreach($period as $date){ $dateArray[] = $date->format('Y-m-d'); } /** * End of boilerplate */ /** * Answer code */ $countArray = ['Jan' => 0, 'Feb' => 0, 'Mar' => 0, 'Apr' => 0, 'May' => 0, 'Jun' => 0, 'Jul' => 0, 'Aug' => 0, 'Sep' => 0, 'Oct' => 0, 'Nov' => 0, 'Dec' => 0]; foreach($dateArray as $dateString){ $date = new \DateTime($dateString); $countArray[$date->format('M')]++; } var_dump($countArray);