[PHP-BUG] Bug #71123 [NEW]: parse_str('.a=1&.b=2', $arr); returns wrong result

[email protected] ("ptcong90 at gmail dot com")
Newsgroups php.standards
Message-ID <[email protected]>
From:             ptcong90 at gmail dot com
Operating system: OS X
PHP version:      5.6.16
Package:          PHP Language Specification
Bug Type:         Bug
Bug description:parse_str('.a=1&.b=2', $arr); returns wrong result

Description:
------------
parse_str returns a wrong result if param start with dot (.)

parse_str('.a=1&.b=2', $arr); 

This issue happend in whole versions of php.

Test script:
---------------
parse_str('.a=1&.b=2', $array);

Expected result:
----------------
Array
(
    [.a] => 1
    [.b] => 2
)


Actual result:
--------------
Array
(
    [_a] => 1
    [_b] => 2
)

-- 
Edit bug report at https://bugs.php.net/bug.php?id=71123&edit=1
-- 
Try a snapshot (PHP 5.4):   https://bugs.php.net/fix.php?id=71123&r=trysnapshot54
Try a snapshot (PHP 5.5):   https://bugs.php.net/fix.php?id=71123&r=trysnapshot55
Try a snapshot (trunk):     https://bugs.php.net/fix.php?id=71123&r=trysnapshottrunk
Fixed in SVN:               https://bugs.php.net/fix.php?id=71123&r=fixed
Fixed in release:           https://bugs.php.net/fix.php?id=71123&r=alreadyfixed
Need backtrace:             https://bugs.php.net/fix.php?id=71123&r=needtrace
Need Reproduce Script:      https://bugs.php.net/fix.php?id=71123&r=needscript
Try newer version:          https://bugs.php.net/fix.php?id=71123&r=oldversion
Not developer issue:        https://bugs.php.net/fix.php?id=71123&r=support
Expected behavior:          https://bugs.php.net/fix.php?id=71123&r=notwrong
Not enough info:            https://bugs.php.net/fix.php?id=71123&r=notenoughinfo
Submitted twice:            https://bugs.php.net/fix.php?id=71123&r=submittedtwice
register_globals:           https://bugs.php.net/fix.php?id=71123&r=globals
PHP 4 support discontinued: https://bugs.php.net/fix.php?id=71123&r=php4
Daylight Savings:           https://bugs.php.net/fix.php?id=71123&r=dst
IIS Stability:              https://bugs.php.net/fix.php?id=71123&r=isapi
Install GNU Sed:            https://bugs.php.net/fix.php?id=71123&r=gnused
Floating point limitations: https://bugs.php.net/fix.php?id=71123&r=float
No Zend Extensions:         https://bugs.php.net/fix.php?id=71123&r=nozend
MySQL Configuration Error:  https://bugs.php.net/fix.php?id=71123&r=mysqlcfg
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