3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = range(1, 10); $b = range('a', 'f'); $c = range('A', 'B'); $output = []; foreach ([$a, $b, $c] as $i => $array) { foreach ($array as $k => $v) { $output[$k][$i] = $v; } } var_export(implode(array_merge(...$output)));
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'

preferences:
113.67 ms | 406 KiB | 5 Q