Req #31649 [Opn]: urldecode does not follow ECMA standard or standard browser practice
Edit report at https://bugs.php.net/bug.php?id=31649&edit=1
ID: 31649
Updated by: ajf@php.net
Reported by: james at gogo dot co dot nz
Summary: urldecode does not follow ECMA standard or standard
browser practice
Status: Open
Type: Feature/Change Request
-Package: Feature/Change Request
+Package: URL related
Operating System: All
-PHP Version: 4.3.10
+PHP Version: *
Block user comment: N
Private report: N
New Comment:
This should probably decode to UTF-8, if it decodes to anything.
Previous Comments:
------------------------------------------------------------------------
[2005-01-21 22:46:35] derick@php.net
PHP doesnt support unicode in a whole lot of places. Marking this as a feature request instead.
------------------------------------------------------------------------
[2005-01-21 22:29:07] james at gogo dot co dot nz
Description:
------------
urldecode() does not understand the %uxxxx format for escaping unicode characters above 0xFF.
This is a very old bug, originally reported as bug #15027 and declared bogus, I believe erroneously,
and here is the reasoning...
In all modern browsers (including Mozilla), JavaScript's escape() function uses %HH for Unicode
codepoints below 0x0100, but %uHHHH for codepoints above there.
From ECMA-262:
--------------
For characters whose Unicode encoding is 0xFF or less, a two-digit escape sequence of the form %xx
is used in accordance with RFC1738. For characters whose Unicode encoding is greater than 0xFF, a
four-digit escape sequence of the form %uxxxx is used.
--------------
I believe this is a bug, PHP is unable to urldecode the valid escape()d values from modern browsers
when those escape()d strings contain unicode characters greater than 0xFF.
Declaring it not a bug because it is not in the RFCs, but rather defined by ECMA is a poor decision.
Reproduce code:
---------------
echo urldecode('%u2013');
Expected result:
----------------
A string containing the three characters comprising the unicode character 0x2013 (En Dash) in utf-8,
namely 0xE2 0x80 and 0x93.
Actual result:
--------------
The literal string "%u2013".
------------------------------------------------------------------------
--
Edit this bug report at https://bugs.php.net/bug.php?id=31649&edit=1
Thread (5 messages)