- print_r: documentation ( source)
- preg_split: documentation ( source)
<?php
$subject = "3v4l.org - online PHP shell, test in 80+ different PHP versions!";
$arr = preg_split('/ |,|\)|\(|\;|\.|\[a-z]/',$subject);
$arr1 = preg_split('~[^\p{L}\p{N}\']+~u',$subject);
print_r($arr);
print_r($arr1);