Online PHP editor | refs for K2Jsn

<?php $array = [ ['group' => 'Apple', 'num' => 5, 'price' => 10], ['group' => 'Apple', 'num' => 2, 'price' => 8], ['group' => 'Orange', 'num' => 4, 'price' => 6], ['group' => 'Orange', 'num' => 12, 'price' => 24], ]; $result = []; foreach ($array as $row) { if (!isset($ref[$row['group']])) { $ref[$row['group']] = $row; $result[] =& $ref[$row['group']]; continue; } $ref[$row['group']]['num'] += $row['num']; $ref[$row['group']]['price'] += $row['price']; } var_export($result);