title: PHP session_start() overwrites HTTP Expires header
body: <p>I am trying to set Expire header to 2 hours from access for text/html by using mod_expires like that:</p>
  
  <pre><code>&lt;IfModule mod_expires.c&gt;
     ExpiresActive on
     ExpiresDefault "access plus 2 hours"
     ExpiresByType text/html "access plus 2 hours"
  &lt;/IfModule&gt;
  </code></pre>
  
  <p>However when used with PHP:</p>
  
  <pre><code>session_start();
  </code></pre>
  
  <p>Expires header is being reset to:</p>
  
  <pre><code>Expires: Thu, 19 Nov 1981 08:52:00 GMT
  </code></pre>
  
  <p>Any ideas how to avoid that overwrite by <code>session_start()</code>?</p>