PHP 7.1.12 Released

imap_utf7_encode

(PHP 4, PHP 5, PHP 7)

imap_utf7_encodeConverts ISO-8859-1 string to modified UTF-7 text

Description

string imap_utf7_encode ( string $data )

Converts data to modified UTF-7 text.

This is needed to encode mailbox names that contain certain characters which are not in range of printable ASCII characters.

Parameters

data

An ISO-8859-1 string.

Return Values

Returns data encoded with the modified UTF-7 encoding as defined in » RFC 2060, section 5.1.3 (original UTF-7 was defined in » RFC1642).

See Also

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User Contributed Notes 4 notes

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2
marcelo at maccoy dot com dot br
12 years ago
<?php
/**
* @return encoded string
* @param string $str       
* @desc Convert str to UTF-7 imap default mailbox names
    (the imap_utf7_encode don t built the same result)
*/
function getEncodedUtf7($str){
    if(!
$str){
       echo
"error: you need to give a string parameter.";
       return
false;                       
    }
# change spaces by entropy because mb_convert fail with spaces
   
$str=ereg_replace(" ","xyxy",$str);               
# if mb_convert work
   
if($str=mb_convert_encoding($str,"UTF-7")){
       
# change characters
           
$str=preg_replace("/\+A/","&A",$str);
       
# change to spaces again
           
$str=preg_replace("/xyxy/"," ",$str);                       
       
# return encoded string
           
return $str;
# else
   
}else{
       
# print error and return false
           
echo "error: is not possible to encode this string '$str'.[".
           
imap_last_error().
           
"]";
            return
false;                     
    }                
}
?>
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1
Anonymous
12 years ago
Note that php4 (4.4.0) will encode IMAP folders in a way that no other program will be able to decode them back.
$ php4 <<EOF
> <?php
> echo "ENCODED: " . imap_utf7_encode("") . "\\n";
>
?>
> EOF
ENCODED: &w5w-

Now try to decode the result string ("&w5w-") using e.g. javamail or python's imaplib, or if you don't like these languages - create an IMAP folder using PHP and try to display it in an IMAP client (mutt, thunderbird, outlook, whatever...)
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0
dn at dnunes dot com
10 years ago
Maccoy function's isn't reliable 'cause it doesn't follow the RFC 2060. It will work fine for most latin chars (which, in base64, will turn into "+A..."), but for other language it can make a big mess. If you're using an internationalizated system, try using the other presented options.
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-1
Anonymous
11 years ago
This encoding will not work for cyrus imapservers and you might have problems with other mail clients.
Use mb_convert_encoding($str, "UTF7-IMAP","ISO-8859-15") instead.

ps: mb_convert_encoding() requires   building php with  --enable-mbstring option
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