title: how to display (test) .php file
body: <p>I'm begin to learn php by my self, for example I have this code,suppose to disply "Hello World"</p>
  
  <pre><code>&lt;html&gt;
   &lt;head&gt;
    &lt;title&gt;PHP Test&lt;/title&gt;
   &lt;/head&gt;
   &lt;body&gt;
   &lt;?php echo '&lt;p&gt;Hello World&lt;/p&gt;'; ?&gt; 
   &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>
  
  <p>I save it as hello.php, but when I open it by Firefox it display like that:</p>
  
  <pre><code>Hello World
  
  '; ?&gt; 
  </code></pre>
  
  <p>can somebody explain for me?</p>