Description:
------------
ob_end_clean() is not producing notices as stated by the manual.
This error has been reported before on bug #14226 dated 2 Jan 2002.

Reproduce code:
---------------
<?php
echo 'foo';

ob_end_clean();

echo 'bar';
?>

Expected result:
----------------
If ob_end_clean() would only return false, because we have not created the buffer, then the expected result would be: 

foobar

Actual result:
--------------
bar