You can do it in one line. I defined a

Question

You can do it in one line. I defined a

couple of variables for better understanding. Combination of str_replace, explode and array_filter for clean the result:

<?php

$paragraph = "one-two / hi hello, universe";
$junk = ['/',',','.',';','-'];
$delimiteer = ' '; // space is better!

$words = array_filter(explode($delimiteer, str_replace($junk, ' ',$paragraph)), function($item){
return trim($item) !== "";
});

var_dump($words);