Description:
------------
PHP engine doesn?t throw the expected parsing error (which is according to doc, ?http://in2.php.net/manual/en/function.parse-ini-file.php.) with the reserved keywords, NO and NULL given as keys in the .ini file. 
For the remaining reserved keywords php throws parsing error which is expected according to doc.


Environment:
Operating System: Linux, Windows XP
PHP Version:PHP 5.2.4-dev (cli) (built: Jul 21 2007 19:21:35)
Copyright (c) 1997-2007 The PHP Group
Zend Engine v2.2.0, Copyright (c) 1998-2007 Zend Technologies
Configure Setup: ./configure

Reproduce code:
---------------
Parse_ini_file.php:
<?php
$ini_array = parse_ini_file(dirname(__FILE__)."/parse.ini");
print_r($ini_array);
?>



parse.ini:
;start of ini file

[ReservedKeys_as_Keys]
;YES = "correct"
;expected parsing error
N0 = "wrong"
NULL = "wrong"

;end of ini file


Expected result:
----------------
PHP Warning:  Error parsing %s/parse.ini on line %d in %s\parse_ini_file.php on line %d
Array
(
)


Actual result:
--------------
Array
(
    [N0] => wrong
    [NULL] => wrong
)