3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr = array(0,null,3,null); $filtered = array_filter($arr, function($var){return !is_null($var);} ); print_r($filtered);
Output for 5.3.0 - 5.3.29, 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 - 8.3.14, 8.4.1
Array ( [0] => 0 [2] => 3 )
preferences:
73.84 ms | 408 KiB | 5 Q