3v4l.org

run code in 500+ PHP versions simultaneously
<?php $a = range(1, 10); $b = range('a', 'f'); $c = range('A', 'B'); var_export(implode(array_merge(...array_map(null, $a, $b, $c))));
Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.32, 8.3.0 - 8.3.32, 8.4.1 - 8.4.23, 8.5.0 - 8.5.8
'1aA2bB3c4d5e6f78910'

preferences:
78.45 ms | 1280 KiB | 4 Q