3v4l.org

run code in 500+ PHP versions simultaneously
<?php $arr_one = [1,2,3,4,5]; $arr_two = [1,3,5]; $new_arr = array_map(function($arg) use ($arr_two) { return in_array($arg, $arr_two) ? "prefix_{$arg}" : $arg; }, $arr_one); var_dump($new_arr);
Output for 5.6.38, 7.0.33, 7.1.25, 7.2.0 - 7.2.33, 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 - 8.3.31, 8.4.1 - 8.4.22, 8.5.0 - 8.5.7
array(5) { [0]=> string(8) "prefix_1" [1]=> int(2) [2]=> string(8) "prefix_3" [3]=> int(4) [4]=> string(8) "prefix_5" }
preferences:
97.84 ms | 1428 KiB | 4 Q