3v4l.org

run code in 500+ PHP versions simultaneously
<?php $first = ['01-1970' => 0.00, '03-2019' => 4350.00, '05-2019' => 150.00, '06-2019' => 50.00]; $second = ['03-2019' => 0.00, '04-2019' => 0.00, '06-2019' => 34.83]; $result = []; foreach ([$first, $second] as $a) { foreach ($a as $k=>$v) { if (!isset($result[$k])) $result[$k] = 0; $result[$k] += $v; } } print_r($result);
Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
Array ( [01-1970] => 0 [03-2019] => 4350 [05-2019] => 150 [06-2019] => 84.83 [04-2019] => 0 )
preferences:
92.51 ms | 1695 KiB | 4 Q