3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = []; $a[] = 1; $a[] = 2; $a[2] = 3; $a[] = 4; var_dump($a);
Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
array(4) { [0]=> int(1) [1]=> int(2) [2]=> int(3) [3]=> int(4) }
preferences:
106.01 ms | 407 KiB | 5 Q