3v4l.org

run code in 300+ PHP versions simultaneously
<?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);

preferences:
127.88 ms | 406 KiB | 5 Q