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run code in 300+ PHP versions simultaneously
<?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);
Output for 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.26, 8.4.1 - 8.4.13
array ( 0 => array ( 'id' => 1, 'uid' => 50, 'sum1' => 3, 'sum2' => 6, ), 1 => array ( 'id' => 3, 'uid' => 51, 'sum1' => 3, 'sum2' => 5, ), )
preferences:
64.38 ms | 406 KiB | 5 Q