- 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
- '1aA2bB3c4d5e6f78910'
<?php
$a = range(1, 10);
$b = range('a', 'f');
$c = range('A', 'B');
var_export(implode(array_merge(...array_map(null, $a, $b, $c))));