3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr=[' ', ' foo ', ' ', ' bar ', 'baz ', ' ']; function something(array $arg) { array_filter($arg, function(&$el){return strlen($el=trim($el));}); } var_dump($arr); something($arr); var_dump($arr);

preferences:
47.48 ms | 402 KiB | 5 Q