3v4l.org

run code in 300+ PHP versions simultaneously
<?php $array = [null, null, null]; $t = array_filter($array, function($value){ return $value != ''; }); var_dump($t);
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 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.7
array(0) { }
preferences:
183.59 ms | 404 KiB | 292 Q