Bug #79213 [Opn]: mb_check_encoding doesn't work with base64

From: Date: Sun, 02 Feb 2020 22:13:48 +0000
Subject: Bug #79213 [Opn]: mb_check_encoding doesn't work with base64
References: 1  Groups: php.bugs 
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Edit report at https://bugs.php.net/bug.php?id=79213&edit=1

 ID:                 79213
 User updated by:    info at ioweb dot gr
 Reported by:        info at ioweb dot gr
 Summary:            mb_check_encoding doesn't work with base64
 Status:             Open
 Type:               Bug
 Package:            Unknown/Other Function
 Operating System:   Debian 9, Ubuntu 18.04
 PHP Version:        7.2.27
 Block user comment: N
 Private report:     N

 New Comment:

From reading the documentation I reached this assumption

In  the docs it says for mb_check_encoding

Checks if the specified byte stream is valid for the specified encoding.

A list of supported encodings I can get from

mb_list_encodings which will also include base64 

So I would assume mb_check_encoding would be able to handle all encodings that mb_list_encodings
shows


Previous Comments:
------------------------------------------------------------------------
[2020-02-02 22:05:04] bugreports at gmail dot com

why do you expect base64 strings to be detected as whatever multibyte encoding?

it's a plain string - not more and not less and "BASE64" is not a multibyte encoding
at all

------------------------------------------------------------------------
[2020-02-02 21:54:05] info at ioweb dot gr

Description:
------------
mb_check_encoding is unable to detect strings that are encoded with base64, it will show false

Example string "test" will yield "dGVzdA=="

but mb_check_encoding fails to detect correctly this is a base64 encoded string



Test script:
---------------
$base64encoded = base64_encode("test");
$valid = mb_check_encoding($base64encoded, "BASE64");


Expected result:
----------------
$valid is true

Actual result:
--------------
$valid is false


------------------------------------------------------------------------



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Edit this bug report at https://bugs.php.net/bug.php?id=79213&edit=1


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