3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = [5 => 'a', 2 => 'b']; $a[] = 'c'; var_dump($a);
Output for 8.0.1 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.27, 8.4.1 - 8.4.14
array(3) { [5]=> string(1) "a" [2]=> string(1) "b" [6]=> string(1) "c" }
preferences:
111.32 ms | 406 KiB | 5 Q