mb_encode_mimeheader

(PHP 4 >= 4.0.6, PHP 5, PHP 7)

mb_encode_mimeheader — Encode string for MIME header

Description

mb_encode_mimeheader ( string $string [, string|null $charset = null [, string|null $transfer_encoding = null [, string $newline = "\r\n" [, int $indent = 0 ]]]] ) : string

Encodes a given string string by the MIME header encoding scheme.

Parameters

string: The string being encoded. Its encoding should be same as mb_internal_encoding().
charset: charset specifies the name of the character set in which string is represented in. The default value is determined by the current NLS setting (mbstring.language).
transfer_encoding: 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.
newline: newline 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.
indent: Indentation of the first line (number of characters in the header before string).

Return Values

A converted version of the string represented in ASCII.

Changelog

Version	Description
8.0.0	`charset` and `transfer_encoding` are nullable now.

Examples

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;
?>

Notes

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.