What is the difference between include & require_once in php?
<blockquote>
  <p><strong>Possible Duplicate:</strong><br>
  <a href="http://stackoverflow.com/questions/2418473/when-should-i-use-require-once-vs-include">When should I use require_once vs include?</a>  </p>
</blockquote>



<p>I have been using both <code>include</code> &amp; <code>require_once</code> many times in php , but still I'm not fully aware of exact difference between them.</p>
