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From: Arno Welzel <usenet@arnowelzel.de>
Newsgroups: comp.lang.php
Subject: Re: Encoding Problems
Date: Sat, 05 Jul 2014 03:16:59 +0200
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stef_204, 2014-07-02 17:53:

> Hi,
> 
> Newbie at php; please bear with me.
> 
> I am trying to use a script which basically creates an xml feed for email
> messages found in an IMAP account; one can then either subscribe to feed
> via an rss reader/aggregator or use browser to read html page.
> 
> Here is the script: <http://linuxtrove.com/wp/?p=209>
> (imap2rss.php)
> 
> My problem: almost all of the messages (emails) show garbled text, I
> believe due to encoding problems.
> 
> Here is a picture of how it looks both using a browser like Firefox or an 
> rss news feed reader.
> 
> <http://imagebin.org/314843>

This is base64 and as to be decoded.

[...]
> I could be completely wrong about the utf-8 issue; and perhaps it has 
> more something to do with decoding base64 in general.

Yep - that's the point.

> This is what I now think is the problem, more specifically:
> I have just tried a base64 online decoder and pasted the garbled text in 
> it and used the "decode" online feature, and the result is perfectly 
> legible once decoded, whether I choose utf-8 or ascii as charset (but I 
> should use utf-8).
> 
> So, looks like the feed is "echoed" or "printed" in base64 format....
> It doesn't look like charset is the problem but decoding base64.

Yep.

> 
> I can see the base64_decode function here
> <http://www.php.net/manual/en/function.base64-decode.php>
> but not sure if this is the right way to go about this; or how to apply 
> it in this script.

Well - unfortunately there is no easy "put it in there and it works".

First of all: Just testing for the subtype "PLAIN" (is not enough. You
also have to check for the encoding.

As far i see, this should be added here:

if($msgStructure->subtype=="PLAIN")
$body = renderPlainText($body);

So extend that for the encoding:

if($msgStructure->subtype=="PLAIN")
{
  switch($msgStructure->encoding)
  {
  case 4:
    // Body text is quoted-printable encoded
    $body = quoted_printable_decode($body);
    break;

  case 3:
    // Body text is base64 encoded
    $body = base64_decode($data);
    break;
  }

  $body = renderPlainText($body);
}

Also see <http://php.net/manual/en/function.imap-fetchstructure.php> and
the comments there.



-- 
Arno Welzel
http://arnowelzel.de
http://de-rec-fahrrad.de
http://fahrradzukunft.de