3v4l.org

run code in 300+ PHP versions simultaneously
<?php $_POST = [ 'wind' => [ 1 => 'hk', 2 => 'pop', 25 => 'another' ] ]; end($_POST['wind']); echo key($_POST['wind']);
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 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 - 8.1.31, 8.2.0 - 8.2.26, 8.3.0 - 8.3.15, 8.4.1 - 8.4.2
25
preferences:
98.51 ms | 408 KiB | 5 Q