(PHP 4, PHP 5, PHP 7, PHP 8)
imap_utf7_encode — Converts ISO-8859-1 string to modified UTF-7 text
$string
) : string
Converts string to modified UTF-7 text.
This is needed to encode mailbox names that contain certain characters which are not in range of printable ASCII characters.
stringAn ISO-8859-1 string.
Returns string encoded with the modified UTF-7
encoding as defined in » RFC 2060,
section 5.1.3.
For those who search for a good implementation of modified UTF-7 encoding for IMAP, you can find a code that works on :
http://tananyag.ntszki.hu/mail/functions/imap_utf7_local.php
The result is different from imap-utf7-encode() function and is identical to mailbox name generated by Thunderbird.
Maccoy function's isn't reliable 'cause it doesn't follow the RFC 2060. It will work fine for most latin chars (which, in base64, will turn into "+A..."), but for other language it can make a big mess. If you're using an internationalizated system, try using the other presented options.
This encoding will not work for cyrus imapservers and you might have problems with other mail clients.
Use mb_convert_encoding($str, "UTF7-IMAP","ISO-8859-15") instead.
ps: mb_convert_encoding() requires building php with --enable-mbstring option
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...)
<?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;
}
}
?>