title: PHP Closing Tag: =?>
body: <p>I've just seen <a href="http://www.php.net/manual/en/function.flush.php#91606" rel="nofollow">this comment</a> on php.net, which contains the following snippet of code:</p>
  
  <pre><code>&lt;/head&gt;
  &lt;?= ob_flush(); =?&gt;
  &lt;body&gt;
  </code></pre>
  
  <p>I've not seen the <code>=?&gt;</code> used before (I'm fine with the <code>&lt;?=</code>, that's obvious) and when I put it in a test file it gave a syntax error. So, is this just a typo, or is there any situation where this is syntactically valid?</p>