3v4l.org

run code in 300+ PHP versions simultaneously
<?php $mymap = ['z' => 'zombies', 'b' => 'babel fish', 'a' => 'angels', 'd' => 'dice']; ksort($mymap); foreach($mymap as $k => $v) { echo 'k:', $k, ' ', 'v:', $v, PHP_EOL; }
Output for 7.1.0 - 7.1.21, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.29, 8.0.0 - 8.0.19, 8.1.0 - 8.1.6
k:a v:angels k:b v:babel fish k:d v:dice k:z v:zombies

preferences:
61.48 ms | 409 KiB | 5 Q