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run code in 500+ PHP versions simultaneously
<?php $array = [ [30, 5, 6, 7, 8, 9, 2, 5], [50, 4, 8, 4, 4, 6, 9, 2] ]; var_export( array_map(fn(...$col) => array_sum($col), ...$array) );

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25.1 ms | 476 KiB | 4 Q