3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = range(1, 10); $b = range('a', 'f'); $c = range('A', 'B'); var_export( array_merge( ...array_map( fn(...$col) => array_filter( $col, fn($v) => !is_null($v) ), $a, $b, $c ) ) );
Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
array ( 0 => 1, 1 => 'a', 2 => 'A', 3 => 2, 4 => 'b', 5 => 'B', 6 => 3, 7 => 'c', 8 => 4, 9 => 'd', 10 => 5, 11 => 'e', 12 => 6, 13 => 'f', 14 => 7, 15 => 8, 16 => 9, 17 => 10, )
preferences:
115.17 ms | 407 KiB | 5 Q