title: PHP post form hidden input
body: <p>I have a form</p>
  
  <pre><code>&lt;form class="well form-search" method="post"&gt;
      &lt;input type="hidden" name="act" value="add"/&gt;
      &lt;input type="text" name="uname" placeholder="User name" /&gt;
      &lt;input type="password" name="passwd" placeholder="Password" /&gt;
      &lt;button type="submit" class="btn"&gt;Add User&lt;/button&gt;
  &lt;/form&gt;
  </code></pre>
  
  <p>'uname' and 'passwd' end up in $_POST but 'act' is in $_GET for some reason.  </p>