3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr = [1,2,3]; var_dump(key(array_slice($arr, 2, 1, true))); var_dump(end(array_slice($arr, 2, 1, true)));
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
int(2) Notice: Only variables should be passed by reference in /in/XT9ev on line 4 int(3)
Output for 7.3.32 - 7.3.33
int(2) int(3)
Output for 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
int(2) Strict Standards: Only variables should be passed by reference in /in/XT9ev on line 4 int(3)

preferences:
249.57 ms | 402 KiB | 273 Q