3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = ['a', 'b', 'c']; $b = ['d', 'e', 'f', 'g']; var_export(array_map(fn() => implode(func_get_args()), $a, $b));
Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
array ( 0 => 'ad', 1 => 'be', 2 => 'cf', 3 => 'g', )

preferences:
142.29 ms | 402 KiB | 123 Q