- Output for 8.0.1 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
- array ( 1 => 1, 2 => 1, 5 => 1, 6 => 1, 3 => 0, 4 => 0, 7 => 0, 8 => 0, )
<?php
$mode[1] = [1, 2, 5, 6];
$mode[0] = [3, 4, 7, 8];
var_export(
array_reduce(
array_keys($mode),
fn($result, $k) => $result += array_fill_keys($mode[$k], $k),
[]
)
);