3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = ['a', 'b', 'c']; $b = ['d', 'e', 'f', 'g']; var_export(array_map(fn(...$column) => implode($column), $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', )

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155.01 ms | 402 KiB | 123 Q