3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr = array(1,2,3,4,5); array_unshift($arr, array_pop($arr)); var_dump($arr);
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.30, 8.2.0 - 8.2.25, 8.3.0 - 8.3.13
array(5) { [0]=> int(5) [1]=> int(1) [2]=> int(2) [3]=> int(3) [4]=> int(4) }
preferences:
85.47 ms | 408 KiB | 5 Q