3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr = array(7, NAN, 3, 9); sort($arr); print_r($arr);
Output for 7.0.23 - 7.0.33, 7.1.9 - 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 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Array ( [0] => NAN [1] => 3 [2] => 7 [3] => 9 )
Output for 7.0.0 - 7.0.22, 7.1.0 - 7.1.8
Array ( [0] => 7 [1] => NAN [2] => 3 [3] => 9 )
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.38
Array ( [0] => 3 [1] => 9 [2] => NAN [3] => 7 )
preferences:
238.18 ms | 402 KiB | 322 Q