Bug #53596 [NEW]: Function iconv_mime_decode failed to decode utf-8 header

From: Date: Thu, 23 Dec 2010 10:02:28 +0000
Subject: Bug #53596 [NEW]: Function iconv_mime_decode failed to decode utf-8 header
Groups: php.bugs 
Request: Send a blank email to php-bugs+get-157282@lists.php.net to get a copy of this message 
From:             
Operating system: CentOS release 5.5
PHP version:      5.3.4
Package:          ICONV related
Bug Type:         Bug
Bug description:Function iconv_mime_decode failed to decode utf-8 header

Description:
------------
---
From manual page: http://www.php.net/function.iconv-mime-decode
---

Function iconv_mime_decode can't decode header with non-ascii characters,
if 
charset differs from ISO-8859-1.

For example iconv_mime_decode can't decode string
"Subject: =?utf-8?Q?=D0=9F=D1=80=D0=B8=D0=B2=D0=B5=D1=82,=20=D0=9C=D0=B5?=
 =?utf-8?Q?=D0=B4=D0=B2=D0=B5=D0=B4!=20(Hello,=20Bear!)?="

Test script:
---------------
<?php

$plan = array(
    // It's erroneous way to encode non-ascii text with ISO-8859-1, but 
    // in this case the encode and the decode are inverse functions
    // i. e. $a == decode(encode($a))
    array(
        'description'    => "Non-ASCII characters, ISO-8859-1 to ISO-8859-1
conversion",
        'subject'        => "Привет,
Медведь! (Hello, Bear!)",

        'prefs'          => array(
            'input-charset'  => 'iso-8859-1',
            'output-charset' => 'iso-8859-1',
        )
    ),
    // unfortunately fails
    array(
        'description'    => "Non-ASCII characters and UTF-8",
        'subject'        => "Привет, Медвед!
(Hello, Bear!)",
        'prefs'          => array(
            'input-charset'  => 'utf-8',
            'output-charset' => 'utf-8',
        )
    ),
    array(
        'description'    => "Only ASCII characters and UTF-8",
        'subject'        => "Hello, Bear!",
        'prefs'          => array(
            'input-charset'  => 'utf-8',
            'output-charset' => 'utf-8',
        )
    ),
    array(
        'description'    => "Only ASCII characters and Windows-1251
charset",
        'subject'        => "Hello, Bear!",
        'prefs'          => array(
            'input-charset'  => 'utf-8',
            'output-charset' => 'windows-1251',
        )
    ),
    array(
        'description'    => "Non-ASCII characters and Windows-1251
charset",
        'subject'        => "Привет,
Медведь! (Hello,
Bear!)",
        'prefs'          => array(
            'input-charset'  => 'utf-8',
            'output-charset' => 'windows-1251',
        )
    )
);

foreach ($plan as $case) {
    
    printf("\n\nStart: %s\n%s\n", $case['description'],
str_repeat("=",
80));
    
    $prefs = $case['prefs'];
    $prefs['scheme'] = 'Q';

    $subject_encoded = iconv_mime_encode('Subject', $case['subject'],
$prefs);
    
    printf("Encoded subject: %s\n", var_export($subject_encoded, 1));
    
    if (!$subject_encoded) {
        $status = 'FAILED due to iconv_mime_encode';
    } else {
        $status = false === iconv_mime_decode($subject_encoded) ? 'FAILED'
: 'PASSED';
    }
    
    printf("[%s] %s\n", $status, $case['description']);
}

echo "\n";


Expected result:
----------------
All tests should pass.

Actual result:
--------------
Start: Non-ASCII characters, ISO-8859-1 to ISO-8859-1 conversion
================================================================================
Encoded subject: 'Subject:
=?iso-8859-1?Q?=D0=9F=D1=80=D0=B8=D0=B2=D0=B5=D1=82,?
=
 =?iso-8859-1?Q?=20=D0=9C=D0=B5=D0=B4=D0=B2=D0=B5=D0=B4=D1=8C!=20(Hello,?=
 =?iso-8859-1?Q?=20Bear!)?='
[PASSED] Non-ASCII characters, ISO-8859-1 to ISO-8859-1 conversion


Start: Non-ASCII characters and UTF-8
================================================================================
Encoded subject: 'Subject: =?utf-8?Q?
=D0=9F=D1=80=D0=B8=D0=B2=D0=B5=D1=82,=20=D0=9C=D0=B5?=
 =?utf-8?Q?=D0=B4=D0=B2=D0=B5=D0=B4!=20(Hello,=20Bear!)?='
[FAILED] Non-ASCII characters and UTF-8


Start: Only ASCII characters and UTF-8
================================================================================
Encoded subject: 'Subject: =?utf-8?Q?Hello,=20Bear!?='
[PASSED] Only ASCII characters and UTF-8


Start: Only ASCII characters and Windows-1251 charset
================================================================================
Encoded subject: 'Subject: =?windows-1251?Q?Hello,=20Bear!?='
[PASSED] Only ASCII characters and Windows-1251 charset


Start: Non-ASCII characters and Windows-1251 charset
================================================================================
Encoded subject: 'Subject: =?windows-1251?Q?
=CF=F0=E8=E2=E5=F2,=20=CC=E5=E4=E2=E5=E4=FC!=20(?=
 =?windows-1251?Q?Hello,=20Bear!)?='
[FAILED] Non-ASCII characters and Windows-1251 charset

-- 
Edit bug report at http://bugs.php.net/bug.php?id=53596&edit=1
-- 
Try a snapshot (PHP 5.2):            http://bugs.php.net/fix.php?id=53596&r=trysnapshot52
Try a snapshot (PHP 5.3):            http://bugs.php.net/fix.php?id=53596&r=trysnapshot53
Try a snapshot (trunk):              http://bugs.php.net/fix.php?id=53596&r=trysnapshottrunk
Fixed in SVN:                        http://bugs.php.net/fix.php?id=53596&r=fixed
Fixed in SVN and need be documented: http://bugs.php.net/fix.php?id=53596&r=needdocs
Fixed in release:                    http://bugs.php.net/fix.php?id=53596&r=alreadyfixed
Need backtrace:                      http://bugs.php.net/fix.php?id=53596&r=needtrace
Need Reproduce Script:               http://bugs.php.net/fix.php?id=53596&r=needscript
Try newer version:                   http://bugs.php.net/fix.php?id=53596&r=oldversion
Not developer issue:                 http://bugs.php.net/fix.php?id=53596&r=support
Expected behavior:                   http://bugs.php.net/fix.php?id=53596&r=notwrong
Not enough info:                     http://bugs.php.net/fix.php?id=53596&r=notenoughinfo
Submitted twice:                     http://bugs.php.net/fix.php?id=53596&r=submittedtwice
register_globals:                    http://bugs.php.net/fix.php?id=53596&r=globals
PHP 4 support discontinued:          http://bugs.php.net/fix.php?id=53596&r=php4
Daylight Savings:                    http://bugs.php.net/fix.php?id=53596&r=dst
IIS Stability:                       http://bugs.php.net/fix.php?id=53596&r=isapi
Install GNU Sed:                     http://bugs.php.net/fix.php?id=53596&r=gnused
Floating point limitations:          http://bugs.php.net/fix.php?id=53596&r=float
No Zend Extensions:                  http://bugs.php.net/fix.php?id=53596&r=nozend
MySQL Configuration Error:           http://bugs.php.net/fix.php?id=53596&r=mysqlcfg

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