IMAP 函数
在线手册：中文 英文
PHP手册

imap_utf8

(PHP 4, PHP 5)

imap_utf8 — Converts MIME-encoded text to UTF-8

说明

string imap_utf8 ( string $mime_encoded_text )

Converts the given mime_encoded_text to UTF-8.

参数

mime_encoded_text

A MIME encoded string. MIME encoding method and the UTF-8 specification are described in » RFC2047 and » RFC2044 respectively.

返回值

Returns an UTF-8 encoded string.

参见

IMAP 函数
在线手册：中文 英文
PHP手册
PHP手册 - N: Converts MIME-encoded text to UTF-8

用户评论:

kloewer at gmail dot com (17-Oct-2011 11:08)

Use  iconv_mime_decode();

<?php
// This yields "Subject: Prüfung Prüfung"
echo iconv_mime_decode("Subject: =?UTF-8?B?UHLDvGZ1bmcgUHLDvGZ1bmc=?=",
                       0, "ISO-8859-1");
?>

http://php.net/manual/de/function.iconv-mime-decode.php

ThEDocTor (17-May-2011 01:08)

This will get the German characters right once you fetch the overview(imap_fetch_overview)..
<?php
    $from = $overview[0]->from;
    $tmpfrom = imap_mime_header_decode($from);
    $from = quoted_printable_decode($tmpfrom[0]->text);
?>

esvit at mail dot ru (26-Jan-2011 01:12)

That fixed the all caps issue:

<?php
function imap_utf8_fix($string) {
  return iconv_mime_decode($string,0,"UTF-8");
}
?>

tomlove at gmail dot com (09-Mar-2010 06:59)

This function strictly observes parts of RFC 2047 to the extent that it may not decode encoded-words produced by non-compliant composing agents.

1. It is strict about a 76-character maximum length for encoded-words. Gmail may produce an encoded-word longer than this, and this will be passed through without decoding.

2. It is strict about the rule that encoded-words be separated by linear-white-space from adjacent text. Encoded-words not so separated will be ignored.

3. Invalid "B" encodings will cause this function to return without decoding ANY encoded-words in the string (including any valid ones).

But...

4. Invalid "Q" encodings are decoded with invalid characters (e.g. > 127) still in place.

The advantage of this function over mb_decode_mimeheader() is that it will decode any character set, including non-existent ones (by assuming UTF-8).

number0 at tlen dot pl (06-Jul-2009 10:43)

string in uppercase error http://bugs.php.net/bug.php?id=44098
my function to decode string

<?php
function decodeMimeStr($string, $charset="UTF-8" )
{
      $newString = '';
      $elements=imap_mime_header_decode($string);
      for($i=0;$i<count($elements);$i++)
      {
        if ($elements[$i]->charset == 'default')
          $elements[$i]->charset = 'iso-8859-1';
        $newString .= iconv($elements[$i]->charset, $charset, $elements[$i]->text);
      }
      return $newString;
}
?>

MetaYii (22-Jun-2009 09:24)

Be aware: imap_utf8 tends to return the string in uppercase.

Anonymous webmaster@luzon14DoTCom (30-Jul-2007 08:43)

You may also try this example:

$_subject = "=?iso-8859-1?b?THV6b26uMTQ=?= dot CoM";
echo utf8_decode(imap_utf8($_subject));

OUTPUT: Luzon?14 dot CoM

Regards,
Tuso/Nazareth

hans at lintoo dot dk (19-Sep-2005 12:42)

Also see:
<?php
imap_mime_header_decode($sting);
?>
Don't try to decode subjects with this one... imap_mime_header_decode does a much better job at that.

marcelo at maccoy dot com dot br (14-Feb-2005 08:01)

# this script are correct with the right signs remove expression
# please, ignore the later.
function decode_utf8($str){
       # paterns
           $err="(=\?.{10,13}q\?_?|\?\=)";
           $pat = "/=([0-9A-F]{2})/";
           $cha="'.chr(hexdec(";
       # erase null signs in string
          $str=eregi_replace($err,"",$str);
       # to decode with eval and replace
          eval("\$str='".
                  preg_replace($pat,$cha."'$1')).'",$str)
                  ."';");
        # return
           return $str;
}
#Note: you can to reduce this script in 3 lines.

aperez at informatica dot 24ruedas dot com (11-Jun-2004 10:48)

Here's my new better function... ;)

function decode_ISO88591($string)
{               
  $string=str_replace("=?iso-8859-1?q?","",$string);
  $string=str_replace("=?iso-8859-1?Q?","",$string);
  $string=str_replace("?=","",$string);

  $charHex=array("0","1","2","3","4","5","6","7",
                  "8","9","A","B","C","D","E","F");
       
  for($z=0;$z<sizeof($charHex);$z++)
  {
    for($i=0;$i<sizeof($charHex);$i++)
    {
      $string=str_replace(("=".($charHex[$z].$charHex[$i])),
                         chr(hexdec($charHex[$z].$charHex[$i])),
                         $string);
    }
  }
  return($string);
}

Hope this helps. :)

aperez at informatica dot 24ruedas dot com (10-Jun-2004 08:05)

I got issues decoding strings with spanish characters. I found encodeISO88591() function at this manual as an user note.

After having problems with imap_utf8() and utf8_decode(), I've decided create a function decodeISO88591() for decoding strings encoded with encodeISO88591().

Here's the code(I've translated remarks and variable and array names from spanish to english for better understanding):

function encodeISO88591($string)
{
  // ISO-8859-1 string header
  $stringISO = "=?iso-8859-1?q?";
 
  // Each character are encoded('equal-to' symbol + hexadecimal value from ASCII code)
  for($i=0;$i<strlen($string);$i++)
  {
    // Basic ASCII characters are not encoded
    if(ord(substr($string,$i,1))<1 || ord(substr($string,$i,1))>127)
    {
      $char = ord($string[$i]);
      $char = strtoupper(dechex($char));
      $stringISO.="=".$char;
    }
    else
    {
      $stringISO.=substr($string,$i,1);
    }
  }
 
  // ISO-8859-1 string footer
  $stringISO.="?= ";
 
  return($stringISO);
}

// And this is my function decodeISO88591()

function decodeISO88591($string)
{
  // Arrays for obtaining hexadecimal values
  // for each ISO-8859-1 charset
  $mAlfa=array("A","B","C","D","E","F");
  $mNum=array();
  for($n=0;$n<10;$n++)
  {
    $mNum[]=$n;
  }
 
  // ISO-8859-1 charset
  $iso88591=array(" ","","","","",
                         "","","","","","",
                         "","","","","","",
                         "","","","","","",
                         "","","","","","",
                         "","","","","","",
                         "","","","","","",
                         "","","","","","","",
                         "","","","","","",
                         "","","","","","",
                         "","","","","","","",
                         "","","","","","","",
                         "","","","","","","","",
                         "","","","","","","",
                         "","","","","","","");
  // Hexadecimal values array
  for($a=0;$a<sizeof($mAlfa);$a++)
  {
    for($n=0;$n<sizeof($mNum);$n++)
    {
      $mHex[]=$mAlfa[$a].$mNum[$n];
    }
    for($a2=0;$a2<sizeof($mAlfa);$a2++)
    {
      $mHex[]=$mAlfa[$a].$mAlfa[$a2];
    }
  }
 
  // ISO-8859-1 string header and footer are deleted
  $string=str_replace("=?iso-8859-1?q?","",$string);
  $string=str_replace("?= ","",$string);
 
  // Encoded values are decoded
  for($h=0;$h<sizeof($mHex);$h++)
  {
    $string=str_replace(("=".$mHex[$h]),$iso88591[$h],$string);
  }
 
  return($string);
}

I hope this helps somebody. :)

mogster_at_boomdesign.no (31-Oct-2002 11:53)

To get a complete decode to utf8 (which is the protocol with "national" characters), use these two:
$subject = "=?ISO-8859-1?Q?B=F8lla?=, med =?ISO-8859-1?Q?=F8l?= i baggen";
$subject = imap_utf8($subject);
$subject = utf8_decode($subject);
will return the subject in 8-bit ascii.
That is, both functions.

knutm :-)