why does this php code not execute?
<p>I have a strange problem: This code simply creates an empty page and does not show the hello world message.</p>

<pre><code>&lt;!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"&gt;

&lt;html&gt;

  &lt;meta content="text/html; charset=ISO-8859-1" http-equiv="content-type"&gt;

&lt;title&gt;Austrian Legends&lt;/title&gt;

&lt;/head&gt;

&lt;body&gt;

&lt;?php

echo "hello world";

?&gt;

&lt;/body&gt;

&lt;/html&gt;
</code></pre>

<p>I know my webhoster provides PHP since I have been runnning a php file sucessfully from a form (-> submit).</p>
