3v4l.org

run code in 300+ PHP versions simultaneously
<?php $array = array ( 24 => 24, 25 => 25, 26 => 26, 27 => 27, 28 => 28, 29 => 29, ); $min = min($array) - 1; $max = max($array) + 1; $array[$min] = $min; $array[$max] = $max; print_r($array);
Output for 7.1.25 - 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 ( [24] => 24 [25] => 25 [26] => 26 [27] => 27 [28] => 28 [29] => 29 [23] => 23 [30] => 30 )
preferences:
104.09 ms | 1511 KiB | 4 Q