3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a1=array('a','b','c',''); print_r(array_filter($a1));
Output for 8.0.1 - 8.0.30, 8.1.0 - 8.1.30, 8.2.0 - 8.2.26, 8.3.0 - 8.3.14, 8.4.1
Array ( [0] => a [1] => b [2] => c )
preferences:
68.69 ms | 406 KiB | 5 Q