3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = [[1, 2, 3], [4, 5, 6]]; $a[0] = [1, 1, 1]; var_dump($a);
Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
array(2) { [0]=> array(3) { [0]=> int(1) [1]=> int(1) [2]=> int(1) } [1]=> array(3) { [0]=> int(4) [1]=> int(5) [2]=> int(6) } }
preferences:
107.6 ms | 1650 KiB | 4 Q