title: HTML form button not sending full value
body: <p>I have a simple form for a back button that is supposed to take the PHP <code>$_SERVER['HTTP_REFERER']</code> and use that as the <code>action</code> for the button.</p>
  
  <pre><code>    &lt;?php
          echo "&lt;form class='BackButton' action='" . $_SERVER['HTTP_REFERER'] . "'&gt;";
          echo "&lt;input type='submit' class='button' value='Back' /&gt;";
          echo "&lt;/form&gt;";
      ?&gt;
  </code></pre>
  
  <p>When I navigate to the page with this button and hover over the button it has the correct <code>action='http://engsys.corp.ftr.com//MaterialTracking_Filtered_State.php?search=in'</code> Then when I click the button it drops the <code>?search=in</code> and so the page that comes up isn't correct.</p>
  
  <p>Why does it do this? I thought since it's in the <code>action</code> that it wouild all be sent?</p>