# mb_encode_mimeheader

(PHP 4 >= 4.0.6, PHP 5)

mb_encode_mimeheader — Encode string for MIME header

### Description

string mb_encode_mimeheader ( string `$str` [, string `$charset` [, string `$transfer_encoding` [, string `$linefeed` [, int `$indent` ]]]] )

mb_encode_mimeheader() encodes a given string `str` by the MIME header encoding scheme. Returns a converted version of the string represented in ASCII.

`charset` specifies the name of the character set in which `str` is represented in. The default value is determined by the current NLS setting (mbstring.language).

`transfer_encoding` specifies the scheme of MIME encoding. It should be either "B" (Base64) or "Q" (Quoted-Printable). Falls back to "B" if not given.

`linefeed` specifies the EOL (end-of-line) marker with which mb_encode_mimeheader() performs line-folding (a » RFC term, the act of breaking a line longer than a certain length into multiple lines. The length is currently hard-coded to 74 characters). Falls back to "\r\n" (CRLF) if not given.

Example#1 mb_encode_mimeheader() example

`<?php
$name = ""; // kanji
$mbox = "kru";
$doma = "gtinn.mon";
$addr = mb_encode_mimeheader($name, "UTF-7", "Q") . " <" . $mbox . "@" . $doma . ">";
echo $addr;
?>`

> Note: This function isn't designed to break lines at higher-level contextual break points (word boundaries, etc.). This behaviour may clutter up the original string with unexpected spaces.

The `indent` was added as of PHP 5.

See also mb_decode_mimeheader().