title: Apache HTML5 not showing?
body: <p>I'm using latest Ubuntu 14.04.4 LTS and I installed Apache and PHP.
  I have some problems with PHP and HTML5 documents.</p>
  
  <p>If I navigate localhost/PHPTest.php my browser is blank.
  However, if I remove lines <code>&lt;!DOCTYPE html&gt;</code> AND <code>&lt;meta charset="UTF-8"&gt;</code> I can see my webpage. Why I cannot use those lines? How I can fix this?</p>
  
  <p>This example do not work:</p>
  
  <pre><code>&lt;!DOCTYPE html&gt;
  &lt;html&gt;
  &lt;head&gt;
  &lt;meta charset="UTF-8"&gt;
  &lt;title&gt;This is not working&lt;/title&gt;
  &lt;/head&gt;
  &lt;body&gt;
  &lt;p&gt;This is not working&lt;/p&gt;
  &lt;?php
  echo "Hello World";
  ?&gt;
  &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>
  
  <p>This one works:</p>
  
  <pre><code>&lt;html&gt;
  &lt;head&gt;
  &lt;title&gt;This works&lt;/title&gt;
  &lt;/head&gt;
  &lt;body&gt;
  &lt;p&gt;This works!&lt;/p&gt;
  &lt;?php
  echo "Hello World";
  ?&gt;
  &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>