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@ 2020-01-06T15:33:00Z

<?php

$factor = 10;

// pre PHP 7.4
$nums = array_map(function($n) use ($factor) {
    return $n * $factor;
}, [1,2,3,4]);
var_dump($nums);

// PHP 7.4
$nums = array_map(fn($n) => $n * $factor, [1, 2, 3, 4]);

var_dump($nums);

Output
Performance
VLD
References
Branches

array_map: documentation ( source)
var_dump: documentation ( source)

preferences:dark modelive preview

28.91 ms | 405 KiB | 5 Q