Online PHP editor | output for lBSn4

<?php $array=array( 0 => array( 11 => 18.000, 14 => 25.100, 15 => 5.000, 16 => 8.000, 19 => 21.600 ), 1 => array( 11 => 9.100, 12 => 2.700, 14 => 2.300, 15 => 18.800, 16 => 9.500, 17 => 6.900, 19 => 9.400 ), 2 => array( 14 => 5.700 ), 3 => array( 17 => 2.800, 20 => 6.000 ), 4 => array( 24 => 5.000, 25 => 6.000, 26 => 2.7 ), 5 => array( 16 => 2.200 ), 6 => array( 14 => 13.000, 15 => 2.000, 16 => 4.300, 19 => 6.000 ), 7 => array( 32 => 5.000, 36 => 18.500 ) ); foreach($array as $subarray){ foreach($subarray as $k=>$v){ if(!isset($result[$k])){ $result[$k]=$v; }else{ $result[$k]+=$v; } } } var_export($result);