title: Send dropdown menu variable to url in PHP
body: <p>I'm working on a rating system. The user can rate an item with the dropdown menu:<br></p>
  
  <pre><code>&lt;select name = "theRating"&gt;
  &lt;option&gt;Select...&lt;/option&gt;
  &lt;option&gt;1 Star&lt;/option&gt;
  &lt;option&gt;2 Stars&lt;/option&gt;
  &lt;option&gt;3 Stars&lt;/option&gt;
  &lt;option&gt;4 Stars&lt;/option&gt;
  &lt;option&gt;5 Stars&lt;/option&gt;
  &lt;/select&gt;
  </code></pre>
  
  <p>In the same document, just a few lines later, I want to send the selected option in a url via</p>
  
  <pre><code>&lt;form action="', $scripturl, '?action=rateThisThing?rating=',$_POST['theRating'],'" method="post"&gt;
  &lt;input type="submit" value="Rate this"&gt;&lt;/form&gt;
  </code></pre>
  
  <p>Why doesn't this work? $_POST['theRating'] seems to be empty [or at the very least, it's not showing up in the URL upon redirection...]</p>