title: grep multiple extension current and subfolders
body: <p>I'm trying to grep multiple extensions within the current and all sub-folders.</p>
  
  <pre><code>grep -i -r -n 'hello' somepath/*.{php,html}
  </code></pre>
  
  <p>This is only grepping the current folder but not sub-folders.</p>
  
  <p>What would be a good way of doing this?</p>