3v4l.org

run code in 300+ PHP versions simultaneously
<?php $x = []; $x[2] = 'a'; $x[1] = 'b'; $x[0] = 'c'; ksort($x); echo json_encode($x);
Output for 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.27, 8.4.1 - 8.4.14
["c","b","a"]
preferences:
65.2 ms | 406 KiB | 5 Q