Online PHP editor | refs for 7AYfT

<?php $array = array( "date_2019_12" => 0, "date_2019_11" => 0, "date_2019_10" => 0, "date_2019_09" => 0, "date_2019_08" => 0, "date_2019_07" => 0, "date_2019_06" => 0, "date_2019_05" => 0, "date_2019_04" => 0, "date_2019_03" => 0, "date_2019_02" => 0, "date_2019_01" => 10, "date_2018_12" => 1, "date_2018_11" => 2, "date_2018_10" => 3, "date_2018_09" => 4, "date_2018_08" => 5, "date_2018_07" => 6, ); krsort($array); $newArr = array(); foreach($array as $key => $val) { $i=1; $newArr[$key] = $val; foreach($array as $key2 => $val2){ if($key>$key2 && $i <= 5){ $newArr[$key] += $val2; $i++; } } } var_dump($newArr);