title: How to process HTML on server before sending
body: <p>I want to run a script to process the HTML of a web page just before output - after all PHP and other server side scripts have finished running - adding meta and doing other subtle changes. This is on linux with apache server. Is there a standard way to do this? </p>
  
  <p>I have read about output filters in <code>apache</code>. Is this the right way to go? </p>
  
  <p>Thanks</p>