title: How do I change the delimiter of a list?
body: <pre><code>$variable = 'one, two, three';
  </code></pre>
  
  <p>How can I replace the commas between words with <code>&lt;br&gt;</code>?</p>
  
  <p><code>$variable</code> should become:</p>
  
  <pre><code>one&lt;br&gt;
  two&lt;br&gt;
  three
  </code></pre>