- array_map: documentation ( source)
- array_sum: documentation ( source)
- print_r: documentation ( source)
<?php
$array = array(1001 => Array
(
500
),
1204 => Array
(
750
),
1202 => Array
(
0,
10000,
138456
),
1203 => Array
(
300
)
);
$sum_array = array_map(function ($v) { return array_sum($v); }, $array);
print_r($sum_array);