Online PHP editor | refs for Fpe8P

<?php $array = [ ['id' => 1, 'uid' => 50, 'sum1' => 1, 'sum2' => 2], ['id' => 2, 'uid' => 50, 'sum1' => 2, 'sum2' => 4], ['id' => 3, 'uid' => 51, 'sum1' => 3, 'sum2' => 5], ]; $result = []; foreach ($array as $row) { if (!isset($ref[$row['uid']])) { $ref[$row['uid']] = $row; $result[] =& $ref[$row['uid']]; continue; } $ref[$row['uid']]['sum1'] += $row['sum1']; $ref[$row['uid']]['sum2'] += $row['sum2']; } var_export($result);