3v4l.org

run code in 500+ PHP versions simultaneously
<?php $array = ['darwin' , ' #nature', ' explore', ' galapagos', 'karma']; function remove_hash_space(&$value,$key){ $value = trim($value,'# '); } array_walk($array, 'remove_hash_space'); print_r($array);
Output for 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 - 8.1.34, 8.2.0 - 8.2.31, 8.3.0 - 8.3.31, 8.4.1 - 8.4.22, 8.5.0 - 8.5.7
Array ( [0] => darwin [1] => nature [2] => explore [3] => galapagos [4] => karma )

preferences:
114.14 ms | 1527 KiB | 4 Q