3v4l.org

run code in 500+ 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; }

preferences:
113.77 ms | 1473 KiB | 5 Q