title: PHP: Inject iframe right after body tag
body: <p>I would like to place an iframe right below the start of the body tag. This has some issues since the body tag can have various attributes and odd whitespace. My guess is this will will require regular expressions to do correctly.</p>
  
  <p>EDIT: This solution has to work with php 4 &amp; performance is a concern of mine. It's for this <a href="http://drupal.org/node/586210#comment-2567398" rel="nofollow noreferrer">http://drupal.org/node/586210#comment-2567398</a></p>