Description:
------------
Seems ob_list_handlers() cannot work with functions created dynamically using create_function(). "default output handler" is returned.

Reproduce code:
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<?php
ob_start(create_function('$s', 'return $s;'));
$list = ob_list_handlers();
var_dump($list);
?>

Expected result:
----------------
array(1) { [0]=>  string(...) "name of dynamically created function" }

Actual result:
--------------
array(1) { [0]=>  string(22) "default output handler" }