Technical FAQ
PHP Manual
CSS2 Manual
HTML Manual
JS Guide
JS Reference
PhpDock Manual
Nu-Coder Manual
PhpExpress Manual
PHP Joomla
Learn PHP
Last updated: Tue, 19 Sep 2006


(PHP 4 >= 4.0.6, PHP 5)

mb_encode_mimeheader -- Encode string for MIME header


string mb_encode_mimeheader ( string str [, string charset [, string transfer_encoding [, string linefeed]]] )

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

$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.

See also mb_decode_mimeheader().

Last updated: Tue, 19 Sep 2006