title: Do not escape special characters on form submit
body: <p>I have a form that submits via GET, and one of the hidden fields submits a list of category IDs, separated by comma (1,2,3).</p>
  
  <p>When the get query gets to the page it is going, commas become escaped with <code>%2C</code>.</p>
  
  <p>I cannot make changes to PHP that parses these values, and they must remain commas.</p>
  
  <p>In summary: <code>?category=1,2,3</code> works, and <code>?category=1%2C2%2C3</code> doesn't.</p>
  
  <p>How do I prevent the comma from being encoded?</p>
  
  <p>Edit to address the comment, simplified, but gives you the gist:</p>
  
  <pre><code>&lt;form method="get" action="something.php"&gt;
  &lt;input type="hidden" name="category" value="1,2,3"&gt;
  &lt;input type="submit"&gt;
  &lt;/form&gt;
  </code></pre>